Question

A cyclist travels 3 miles in 15 minutes and then a further 7 miles in 35 minutes without stopping.

Calculate the cyclist's average speed in mph.

Answer 1

Answer:
`12\ mph`

Explanation:

Given

First cyclist travels
`3\ miles` in
`15\ min`

Then,
`7\ miles` in
`35\ min`

Average speed is given by
`=\frac{\text{Distance}}{\text{time taken}}`

`V_(avg)=(3+7)/(15+35)`

`V_(avg)=(10)/(50)=(1)/(5)\ mile/min`

`V_(avg)=(1)/(5)* 60\ miles/hr`

`V_(avg)=12\ mph`

Thus cyclist speed is
`12\ mph`