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`

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

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

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

A thief is noticed by a policeman from a distance of 200 m. The thief starts running and the policeman chases him. The thief and the policeman run at the rate of 10 km and 11 km per hour respectively. What is the distance between them after 6 minutes? 100 m b. 150 m c. 190 m d. 200 m

A thief is spotted by a policeman from a distance of 100 metres.When the policeman starts the chase,the thief also starts running. If the speed of the thief be 8km/hr and that of the policeman 10km/hr ,how far the thief will have run before he is overtaken?

Police is chasing the thief 50 m ahead.In 10 s distance between them reduces by 6m. What is distance between them is 25 s?