Question

Zoe walks at a speed of 10 miles/h and jogs at a speed of 20 miles/h. She goes to the park to walk 2 miles on a Monday. How long will she take to walk 2 miles?

Answer 1

12 minutes

Explanation:

Given

`s_1 = 10mi/h` --- walk speed

`s_2 = 20mi/h` --- jog speed

`d = 2\ miles` --- distance

Required

The time to walk the given distance

Time is calculated as:

`Time = (distance)/(speed)`

In this case, the speed is the speed at which she walks.

So, we have:

`Time = (d)/(s_1)`

Substitute known values

`Time = (2mi)/(10mi/h)`

`Time = 0.2hr`

Convert to minutes

`Time = 0.2 * 60mins`

`Time =12mins`