Rosa and matt are training for a 10kilometer run rosa runs 5.25km in 30 min and matt runs 2.25 in 15 minutes answer the following using the formula for speed km/h = distance km/time h

Question

How long would it take rosa to finish the 10km race if she runs at the same speed as above express your answer to two decimal places

How long would it take matt to finish the 10km race if he runs at the same speed as above express your answer to two decimal places

Answer 1

Hi Demi,

Let's start by manipulating the formula for what we want to solve for Time:

Time h = Distance km/ (speed km/h)

Let's plug in for Rosa: Time h = 10km/( 5.25km/.5h) *Note we convert 30 minutes to .5 hours

.5h can be brought to the numerator: Time h = 10km*.5 h/ 5.25km

km will cancel out: Time h = .95 hours

We can follow the same process for Matt using his values...

Time h = 10km*.25h/2.25km

Time h = 1.11h

Reach out if you have any more questions?