Question

One lap around a track is 1/4 mile. If it takes Mrs. Murphy 1/10 hour to walk 1 lap, what is her walking speed in miles per hour? Show your work.

Answer 1

The speed of Murphy to cover one lap is
`(1)/(40)` miles per hour .

Explanation:

Given as :

The total distance of one lap around track = d =
`(1)/(4)` miles

The time taken by Murphy to walk one lap = t =
`(1)/(10)` hours

Let The speed of Murphy = s miles per hour

Now, According to question

Speed = Distance × Time

Or, s = d × t

Or, s =
`(1)/(4)` miles ×
`(1)/(10)` hours

Or, s =
`(1*1)/(4* 10)` mi/h

Or, s =
`(1)/(40)` mi/h

So,The speed of Murphy = s =
`(1)/(40)` miles per hour

Hence, The speed of Murphy to cover one lap is
`(1)/(40)` miles per hour . Answer