Question #4b96c

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Question #4b96c

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Answer 1 · 2016-08-25T06:51:27

Suppose the cars start at the same time and collide with each other after time $t$ hours

Distance traveled by car A in this time $=" Displacement"$
$="Speed"xx"Time"$
$=20xxt" miles"$
Similarly distance traveled by car B in the same time $=35xxt" miles"$
At the time of collision total distance traveled by both cars must be $=60 " miles"$
$:.$ we have
$20t+35t=60$
$=>55t=60$
Solving for $t$ we obtain
$t=60/55~~1" hr "5 " m "27" s "$

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