Question

A car travels 90 Km in 2 hrs 30 minutes. How much time is required to cover 30 Km with the same speed?

Answer 1

For 90 km it take time 2hrs 30 min or 150 min
So for 30 km it take 50 min if it move with the same speed

Answer 2

There are 60 mins in 1 hour. So 2.5 hours gives us 150 minutes. The car travels 90kms in 150mins. We know that one third of 90kms is 30mins. So the time required by the car to travel 30kms will be one third of 150mins which comes out to be 50mins. Or you can try this method-

90kms in 150mins

30kms in x mins

x= (150 X 30)/90=50 mins