Question

tom drives 200 miles in 4 hour. he drives the first 32 miles at an average speed of 64mph. work out his average sped for the rest of the journey

Answer 1

His average speed for the rest of the journey was of 48mph.

Explanation:

We use the following relation to solve this question:

`v = (d)/(t)`

In which v is the velocity, d is the distance and t is the time.

First 32 miles at an average speed of 64mph.

So the time for these 32 miles is:

`64 = (32)/(t)`

`64t = 32`

`t = (32)/(64)`

`t = 0.5`

Rest of the trip:

200 - 32 = 168 miles in 4 - 0.5 = 3.5 hours. So the average speed is of:

`v = (d)/(t) = (168)/(3.5) = 48`

His average speed for the rest of the journey was of 48mph.