Question

If the track makes 30 miles in 25 minutes, find the time it will need to cover 25 miles

Answer 1

Answer:

• About 21 min

Explanation:

Distance and time are directly related, meaning that distance / time = constant.

In this case the constant is the rate or speed.

Thus you can write:

• speed = distance / time

And, given that covering 30 miles requires 25 minutes, to calculate the time needed to cover 25 miles, you can set this proportion:

• 30 miles / 25 min = 25 miles / t

To clear t you do cross multiplication:

• t × 30 miles = 25 miles × 25 min

Divide both sides by 30 miles:

• t = 25 miles × 25 min / 30 miles = 20.8 min ≈ 21 min ← answer