A car covers a distance in 40 minutes with an average speed of 60 km/h. What should be the average speed to cover the same distance in 25 minutes?
A car covers a distance in 40 min with an average speed =
60km/h = 
m/min
In 1 min, the same distance can be cover with speed =
m/min
In 25 min, the same distance can be cover with speed =
m/min
70