/* * These styles apply ONLY to the header and footer assets. */ /* * These styles apply ONLY to the header and footer assets. */ /* Nav Area */ .nav-area { position:fixed; /* change back to sticky when we remove marks desktop hack pocket */ width:100%; background:#4f6a9f; border-bottom:1px solid #637faf; top:0; z-index:999999; font: 12px Verdana, Geneva, sans-serif; } #nav { list-style:none; margin:0 auto; padding:0; height:22px; font: 13px Verdana, Geneva, sans-serif; line-height:14px; min-width:956px; max-width:1400px; } #nav > li{ float:left; border-left:1px solid #637faf; border-right:1px solid rgba(0, 0 ,0, 0); position:relative; width: 19.70%; } #nav > li:first-child { margin:0; border-left: 1px solid rgba(0, 0 ,0, 0); z-index:999999; } #nav > li.hover:first-child{ border-left: 1px solid #c8c8c8; z-index:999999; } #nav > li:last-child { margin:0; border-right: 1px solid rgba(0, 0 ,0, 0); z-index:999999; } #nav > li.hover:last-child{ border-right: 1px solid #c8c8c8; z-index:999999; } #nav > .active > a, #nav > li.hover, #nav > li.hover > a { background:#fff z-index:999999;; } #nav > li.navLeftBorder { border-left-color: #c8c8c8; z-index:999999; } #nav > li.navRightBorder { border-right-color: #c8c8c8; z-index:999999; } .navLeftBorder .nav-drop-menu { margin-left: -1px; z-index:999999; } #nav li:hover { position:relative; z-index:999999; } #nav > li > a, #nav > li > span { display:block; text-align:center; padding:4px 6px; height:15px; color:#fcfcfc; z-index:999999; } #nav.scaling-active > li > a, #nav.scaling-active > li > span { padding:4px 0; z-index:999999; } #nav.scaling-active > li.hover > a, #nav.scaling-active > li.hover > span { color:#2E4A80; z-index:999999; } #nav a:hover{ text-decoration:none; z-index:999999; } ul { position: relative; list-style: none; padding: 2px; width:100%; margin: 0; background: #4f6a9f; z-index:9999; } ul li { display: block; position: relative; float: left; background: #4f6a9f; width: 100%; } /* This hides the dropdowns */ li ul { display: none; } ul li a, ul li span { display: block; padding: 0.5em 1em; text-decoration: none; white-space: nowrap; color: #fff; max-width: 100%; overflow-x: hidden; text-overflow: ellipsis; cursor: pointer; } ul li a:hover, ul li span:hover { background: #2c3e50; } li:hover > ul { display: block; position: absolute; z-index:999999 !important; } li:hover li { float: none; } li:hover a, li:hover span { background: #2E4A80; } li:hover li a:hover, li:hover li span:hover { background: #2c3e50; z-index:9999999; } .main-navigation li ul li { border-top: 0; } ul ul ul { position:absolute; left: 100%; top: 0; } ul:before, ul:after { content: " "; display: table; } ul:after { clear: both; } .footer { background: #f5f5f6; color: #555a62; font: 12px Verdana,Arial,Helvetica,sans-serif; line-height: 1.5; padding: 18px 0; } .footer-wrap { padding-left: 18px; padding-right: 18px; max-width: 1236px; margin: 0 auto; } .footer a { color: #2e4a80; } .footer a:hover { color: #2e4a80; } .footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; margin: -3px; } .footer-col { padding: 0 3px; } .footer-col-copyRight { justify-content: flex-start; } .footer-col-logo { justify-content: flex-end; } .footer-col-copyRight, .footer-col-logo { flex: 1; display: flex; } .footer-consent { color: #2e4a80; cursor: pointer; text-decoration: underline; } .logo { width: 120px; height: 28px; opacity: 0.6; } @media screen and (max-width: 768px) { .footer-row { display: block; } .footer-col { width: 100%; text-align: center; margin: 6px 0; } .footer-col:first-child { margin-top: 0; } .footer-col:last-child { margin-bottom: 0; } .footer-col-copyRight, .footer-col-logo { justify-content: center; } .logo { margin: 0 auto; } }

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What's the answer?

04-08-2013 5:42pm

#1

forumlover
Registered Users Posts: 40 ✭

Join Date: November 2008

Posts: 38

A car travels 2 miles.

It does the 1st mile at exactly 30mph.

What speed does it travel at to get an average speed of 60mph over the 2 miles?

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Comments

#2 04-08-2013 5:44pm

jamesbondings

Registered Users Posts: 2,201 ✭✭✭

Join Date: January 2009

Posts: 2113

90mph??

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#3 04-08-2013 5:51pm

forumlover

Registered Users Posts: 40 ✭

Join Date: November 2008

Posts: 38

Wrong

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#4 04-08-2013 5:57pm

jamesbondings

Registered Users Posts: 2,201 ✭✭✭

Join Date: January 2009

Posts: 2113

no idea, pm me the answer will ya??

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#5 10-08-2013 3:37pm

Ten of Swords

Moderators, Category Moderators, Social & Fun Moderators, Society & Culture Moderators Posts: 18,251 CMod ✭✭✭✭

Join Date: March 2013

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By travelling the first mile at 30mph it is impossible to achieve average speed of 60mph over 2 miles. It cannot be done.

T=time, D=distance, S=speed (T=D/S)

Time required for average speed over 2 miles @60mph: (D=2,S=60) therefore T=2/60 -> 1/30 of 1 hour... 2 minutes

Time taken travelling the first mile @30mph : (D=1,S=30) therefore T=1/30 of 1 hour as above... 2 minutes

There is simply 0 time left in order to achieve an average speed of 60mph, even travelling at the speed of light would not be fast enough.

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/* * These styles apply ONLY to the header and footer assets. */ /* * These styles apply ONLY to the header and footer assets. */ /* Nav Area */ .nav-area { position:fixed; /* change back to sticky when we remove marks desktop hack pocket */ width:100%; background:#4f6a9f; border-bottom:1px solid #637faf; top:0; z-index:999999; font: 12px Verdana, Geneva, sans-serif; } #nav { list-style:none; margin:0 auto; padding:0; height:22px; font: 13px Verdana, Geneva, sans-serif; line-height:14px; min-width:956px; max-width:1400px; } #nav > li{ float:left; border-left:1px solid #637faf; border-right:1px solid rgba(0, 0 ,0, 0); position:relative; width: 19.70%; } #nav > li:first-child { margin:0; border-left: 1px solid rgba(0, 0 ,0, 0); z-index:999999; } #nav > li.hover:first-child{ border-left: 1px solid #c8c8c8; z-index:999999; } #nav > li:last-child { margin:0; border-right: 1px solid rgba(0, 0 ,0, 0); z-index:999999; } #nav > li.hover:last-child{ border-right: 1px solid #c8c8c8; z-index:999999; } #nav > .active > a, #nav > li.hover, #nav > li.hover > a { background:#fff z-index:999999;; } #nav > li.navLeftBorder { border-left-color: #c8c8c8; z-index:999999; } #nav > li.navRightBorder { border-right-color: #c8c8c8; z-index:999999; } .navLeftBorder .nav-drop-menu { margin-left: -1px; z-index:999999; } #nav li:hover { position:relative; z-index:999999; } #nav > li > a, #nav > li > span { display:block; text-align:center; padding:4px 6px; height:15px; color:#fcfcfc; z-index:999999; } #nav.scaling-active > li > a, #nav.scaling-active > li > span { padding:4px 0; z-index:999999; } #nav.scaling-active > li.hover > a, #nav.scaling-active > li.hover > span { color:#2E4A80; z-index:999999; } #nav a:hover{ text-decoration:none; z-index:999999; } ul { position: relative; list-style: none; padding: 2px; width:100%; margin: 0; background: #4f6a9f; z-index:9999; } ul li { display: block; position: relative; float: left; background: #4f6a9f; width: 100%; } /* This hides the dropdowns */ li ul { display: none; } ul li a, ul li span { display: block; padding: 0.5em 1em; text-decoration: none; white-space: nowrap; color: #fff; max-width: 100%; overflow-x: hidden; text-overflow: ellipsis; cursor: pointer; } ul li a:hover, ul li span:hover { background: #2c3e50; } li:hover > ul { display: block; position: absolute; z-index:999999 !important; } li:hover li { float: none; } li:hover a, li:hover span { background: #2E4A80; } li:hover li a:hover, li:hover li span:hover { background: #2c3e50; z-index:9999999; } .main-navigation li ul li { border-top: 0; } ul ul ul { position:absolute; left: 100%; top: 0; } ul:before, ul:after { content: " "; display: table; } ul:after { clear: both; } .footer { background: #f5f5f6; color: #555a62; font: 12px Verdana,Arial,Helvetica,sans-serif; line-height: 1.5; padding: 18px 0; } .footer-wrap { padding-left: 18px; padding-right: 18px; max-width: 1236px; margin: 0 auto; } .footer a { color: #2e4a80; } .footer a:hover { color: #2e4a80; } .footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; margin: -3px; } .footer-col { padding: 0 3px; } .footer-col-copyRight { justify-content: flex-start; } .footer-col-logo { justify-content: flex-end; } .footer-col-copyRight, .footer-col-logo { flex: 1; display: flex; } .footer-consent { color: #2e4a80; cursor: pointer; text-decoration: underline; } .logo { width: 120px; height: 28px; opacity: 0.6; } @media screen and (max-width: 768px) { .footer-row { display: block; } .footer-col { width: 100%; text-align: center; margin: 6px 0; } .footer-col:first-child { margin-top: 0; } .footer-col:last-child { margin-bottom: 0; } .footer-col-copyRight, .footer-col-logo { justify-content: center; } .logo { margin: 0 auto; } }