Question

The cotters are driving to vist their cousin,who live 500 miles away.They stop for lunch after travelling 170 miles. If their average speed is 55 mph, how many hours do they need to drive after lunch in order to reach their cousin's house?

Answer 1

It'll take them 6h to get to their cousin's house.

Explanation:

Since they travelled 170 miles before stoping for lunch the distance they still had to travel after this stop was 500 - 170 = 330 miles, if they do this at a constant speed of 55 mph we can find the time it'll take them to get to their destination by dividing the distance by the speed. So we have:

time = distance/speed = 330/55 = 6 h