Question

A car travel 60 km in 45min. At the same rate, how kilometres will travel in one hour?

Answer 1

In 45 min a car travels 60 kms

We know 1 hour = 60 min

So in 60 min a car travels 60 x 60 / 45

    = 3600/45 = 20 kms

Answer 2

speed of car is 60km/45min
then
1hr =60min
45min +15 min =1 hr
distance travelled in 15 min is 20km /15min
so distance travelled in 1 hr is
60km+20km = 80Km
so distance travelled in 1hr is 80Km