Question

A cyclist rides his bike at a speed of 18 miles per hours.what is this speed in kilometers per hour? How many kilometers will the cyclist travel in 2 hours ?

Answer 1

• about 29 km/h
• 57.94 km

Explanation:

The conversion factor cancels units of miles and leaves units of km.

`(18\,mi)/(h)\cdot(1.609344\,km)/(1\,mi)=(28.968192\,km)/(h)`

The speed rounds to 29 km/h.

Multiplying the distance per hour by the number of hours, we find the distance to be ...

(28.968192 km/h)×(2 h) = 57.936384 km ≈ 57.94 km