Question

The speed limit on a road is 40mph. A scooter drives 7 miles in 12 minutes. Is the scooter breaking the speed limit?

Answer 1

First of all, observe that 12 minutes are 1/5 of a hour.

The speed is the ratio between distance and time taken, so it is

`s=(7)/((1)/(5))=7\cdot 5=35`

So, it's below the limit.

Answer 2

No, the scooter is travelling at 35mph, therefore under the speed limit of 40mph