how far will a cyclist travel in 15 mins if he cycles at 18

how far will a cyclist travel in 15 mins if he cycles at 18 km per hour?

Solution

Since the speed is given in km/hour
we must convert 15 mins to hours:
15 * 1/60 = .25 hours
.
And, from the \"distance formula\":
d = rt
where
d is distance
r is rate or speed
t is time
.
d = 18*.25 = 4.5 km (distance traveled)