Ramesh is walking at speed of 10 kilometres per hour. After every kilometre he takes rest for 5 minutes. The time taken to cover distance of 5 kilometres by Ramesh is `\ 30\ m inu t e` b. `35\ m inu t e s` c. `50\ m inu t e s` d. `55\ m inu t e s`

A runs twice as fast as B and B runs thrice as fast as C. The distance covered by C in 72 minutes, will be covered by A in 12 m inu t e s b. 16 m inu t e s c. 18 m inu t e s d. 24 m inu t e s

A thief running at 8 km/hr is chased by a policeman whose speed is 10 km/hr. If the thief is 100 metres ahead of the policeman, then the time required for the policeman to catch the thief will be 2 m inu t e s b. 3 m inu t e s c. 6 m inu t e s d. 10 m inu t e s

Deepa rides her bike at an average speed of 30 km/hr and reaches her destination in6 hours. Hema covers the same distance in 4 hours. If Deepa increases her average speed by 10 km/hr and Hema increases her average speed by 5 km/hr what would be the difference in their time taken to reach the destination? 40 m inu t e s b. 45 m inu t e s c. 4 m inu t e s d. 1 hou r e. none of these

An aeroplane flies twice as fast as a train which covers 60 miles in 80 minutes. What distance will the aeroplane cover in 20 minutes? 30 m i l e s b. 35 m i l e s c. 40 m i l e s d. 50 m i l e s

In what time would a cistern be filled by three pipes whose diameters are 1 cm,1 1/3 cm and 2 an running together, when the largest alone will fill it in 61 minutes, the amount of water flowing in by each pipe, being proportional to the square of its diameter? 25 m inu t e s b. 30 m inu t e s c. 36 m inu t e s d. 40 m inu t e s

Raj travels a distance of one kilometre at a speed of 1 m/s and 4 km at a speed of 30 km/h. Find the total time taken to cover the entire distance (in seconds).

A train travel at an average of 50 mile per hour for 2 1/2 hours and then travels to a speed of 70 miles per hour for 1 1/2 hors. How far did the train travel in the entire 4 hours? 120 m i l e s b. 200 m i l e s c. 10 m i l e s d. 230 m i l e s

A train is moving towards north with a speed of 180 kilometre per hour. If the vertical comonent of the earth's magnetic field is 0.2xx10^(-4) T, the emf induced in the axle 1.5 m longs is -