Question
Asked Nov 24, 2019
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A car travels 392 mi. A second car, traveling 7 mph faster than the first car, makes the same trip in 1 h less time. Find the speed of each car.

first car mph
second car     mph
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Expert Answer

Step 1

Given:

Two cars travel a distance of 392 miles. Also, second car travels 7mph faster than the first car and covers the distance of 392 miles in 1 hour less time.

Step 2

Let x be the speed of the first car. Then x + 7 will be the speed of the second car.

It is known that,

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distance Time speed

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Step 3

From the given in...

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392 1 hour 392 x7 392(x+7)-392(x) x(x +7) x(x+7)392(x)2744-392(x) x27x-2744= 0 1 =

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