By how much percent must a motorist increase his speed in order to reduce by 20%, the time taken to cover a certain distance? `20` b. `25` c. `30` d. `35`

How much ice must be added to 100 g water at 30^@C in order to reduce its temperature to 20^@C ?

A bus covers a distance of 400 km with a speed of 20 km/h. What time is taken by the bus to cover this distance?

When the speed of a train is increased by 20%, it takes 20 minutes less to cover the same distance. What is the time taken to cover the same distance with the original speed ?

If the price of wheat rises by 25%, then by how much percent must a man reduce his consumption in order to keep his budget the same as before ?

If Sonu is driving a car at a speed of 20 m/s, then in how much time Sonu will cover a distance of 936 km ?

If the price of tea increased by 20% by what percent must the consumption reduced to keep the expense the same?

The price of an article is reduced by 25%. In order to retain the original price,the present price has to be increased by 20% b.25% c.50% d.33(1)/(3)%