Question

A cyclist rides his bike at a peed of 15 miles per hour. What is this speed in kilometers per hour? How many kilometers will the cyclist travel in 3 hours?

Answer 1

Multiply this 15 mph by the conversion factor derived from 1.6 km = 1 mi:

15 mph 1.6 km

------------ * ---------- = 24 km/hr

1 1 mi

The cyclist's speed in km/hr is 24 km/hr.

In 3 hrs the cyclist can cover (24 km/hr)(3 hr) = 72 km.