Average speed of car 1 = 35 mph. average speed of car 2 = 55 mph. time elapsed between start of car 1 and start of car 2 = 18 minutes. how long before car 2 overtakes car 1? hour. 0.33 0.53 0.43

0.53

Step-by-step explanation:

Given that two cars are going in the same direction.

I car started 18 minutes before.

So initially I car would be distance travelled 18 minutes ahead of II car which is yet to start

Since speed is 35 miles per hour i.e. 35(60) miles per minute

in 18 minutes distance travelled by I car = 35(18/60) = 10.5 miles

The relative speed = difference of speeds = 55-35 = 20 mph

TO overtake car I time taken

= distance ahead by I car/relative speed

=

In hours this equals = 0.53

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9