Question

tomorrow joelle wants to travel a total of 4 miles by walking and running. she plans to run for 20 minutes at a rate of 6 miles per hour. how many minutes should she's walk at a rate of 3 miles per hour to finish traveling the 4 miles?

Answer 1

Answer:

40 minutes

Step-by-step explanation:

Joelle wants to run for 20 minutes at rate 6 miles per hour so the distance traveled in this duration will be calculated by multiplying speed and time(in hours).

So, distance traveled in 20 minutes = $6 \times \frac{20}{60}$ = 2 miles.

As Joelle have to travel total 4 miles, the distance remaining after 20 minutes of traveling = 4 - 2 = 2 miles.

Now she has to walk for the remaining distance i.e. 2 miles with a speed of 3 miles/hour.

The time required to travel 2 miles will be calculated by dividing distance with speed.

So, time required = $\frac{2}{3}$ hours.

Thus time in minutes = $\frac{2}{3}\times 60$ = 40 minutes.