One car travels at 10 miles an hour and another travels at 5 mph. in how many hours will they be 45 miles apart?

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Answer 1 · 2016-10-18T08:27:24

$t=3" hours or 9 hours"$

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$"area under graph gives displacement..."$

$"if cars move at the same direction :"$

$10*t-5*t=45$

$5t=45$

$t=45/5$

$t=9 " hours"$

$"if cars move at opposite direction"$

enter image source here

$10t+5t=45$

$15t=45$

$t=3" hours"$