Question

Marvin walks at a speed of 7 feet per minute. How many miles per hour is this?

Answer 1

`(7)/(88)\ (miles)/(hour)`

or

`0.08\ (miles)/(hour)`

Explanation:

we know that

The speed is equal to divide the distance by the time

Let

s ----> the speed

x ----> the distance

y ----> the time

so

`s=(x)/(y)`

we have

`x=7\ ft`

`y=1\ min`

Remember that

`1\ mile=5,280\ feet`

`1\ hour=60\ minutes`

so

`x=7\ ft=(7)/(5,280)\ mi`

`y=1\ min=(1)/(60)\ h`

Find out the speed in miles per hout

`s=((7/5,280))/((1/60))=(420)/(5,280)\ (miles)/(hour)`

Simplify

`(7)/(88)\ (miles)/(hour)`

or

`0.08\ (miles)/(hour)`