Question

I need help fast please!

The time it takes to cover the distance between two cities by car varies inversely with the speed of the car.

The trip takes 7 hours for a car moving at 36 mph.

What is the speed of a car that makes the trip in 9 hours?

Answer 1

28 mph

Explanation:

Given that a car moving 36 mph takes 7 hours for a trip, you want to know the speed if the trip takes 9 hours.

Time and Speed

The speed and time vary inversely for the same distance. If the time goes up by a factor of 9/7, the speed will go down by the inverse factor: 7/9.

7/9 × 36 mph = 28 mph

The speed of the car is 28 mph for the 9-hour trip.

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