Average speed of car 1 = 55 mph. average speed of car 2 = 70 mph. time elapsed between start of car 1 and start of car 2 = 4 minutes. how long before car 2 overtakes car 1? hour =

Step-by-step explanation:

Alright, lets get started.

Suppose car 2 overtakes car 1 at distance d in t hrs after car 1 moves.

So, distance covered by car 1 in t hrs will be :

distance covered by car 2 will take 4 minutes less that car 1, so time will be

So, distance covered by car 2 will be:

Both distance will be same for overtaking, so

It will take 0.31 hrs to overtake car 1   :   Answer

Hope it will help :)

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

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