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?
1 answer:
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.
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