Question #4b96c

1 Answer
Aug 25, 2016

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

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