A convex lens of glass has power P in air. If it is immersed in water, its power will be?

A bus is moving with a speed of 30 km/hr ahead of a car with a speed of 50 km/hr. How many kilometers apart are they if it takes 15 minutes for the car to catch up with the bus?

Priya goes to school from her house in 30 minutes. Siva takes 45 minutes in covering the same distance Find the ratio between time taken by Priya and Siva.

If a man covers 10.2 km in 3 hours the distance covered by him in 5 hours is

Prasanna runs at 15.6 km/hr. How many meters does he run in 2 minutes?

A man covered a distance of 180 km in 4 hours on a bike. How much distance will be cover on a bicycle in 8 hours if he rides the bicycle at one sixth the speed of the bike?

A vehicle travels at the rate of 80 kmph. What distance will it travel in 15 minutes?

Two cyclists starts on a circular track from a given point but in opposite directions with speeds of 7 m/sec and 8 m/sec respectively. If the circumference of the circles is 300 metres, after what time will they meet at the starting point?

A man goes uphill with an average speed of 35 km/hr and comes down with an average speed of 45 km/hr/ The distance travelled in both the cases being the same, the average speed for the entire journey is

A car can finish a certain journey in 10 hours at a speed of 48 km/hr. In order to cover the same distance in 8 hours, the speed of the car must be increased by

A passenger train runs at the rate of 80 kmph. It starts from the station, 6 hours after a goods train leaves the station. The passenger train overtakes the goods train after 4 hours. The speed of goods train is