A sped of 30.6 km/hr is the same as `5. 1\ m//s e c` b. `8. 5\ m//s e c` c. `110. 16\ m//s e c` d. none of these

A is travelling at 72 km per hour on a highway while B is travelling at a speed of 2 metres per second. What is the difference in their speeds in metres per seconds? 1 1/2m//s e c b. 2m//s e c c. 3 m//s e c d. 5m//s e c

A train crosses a platform 100 m long in 60 seconds at a speed of 45 km/hr. The time taken by the train' to cross an electric pole is: 8\ s e c b. 52\ s e c c. 1\ m inu t e s d. Data inadequate

A train running at the speed of 60 kmph crosses a 200 m long platform in 27 seconds. What is the length of the train ? 200 m e t r e s b. 240 m e t r e s c. 250 m e t r e s d. 450 m e t r e s e. none of these

If by dropping a stone in a quiet lake a wave moves in circle at a speed of 3.5 cm/sec, then the rate of increase of the enclosed circular region when the radius of the circular wave is 10 cm, is (pi=(22)/7) 220s qdotc m//s e c b. 110s qdotc m//s e c c. 35 s qdotc m//s e c d. 350s qdotc m//s e c

A train moving at 15 m/sec takes 20 seconds to pass a cyclist moving in the same direction as that of the train. How much time will be train need to pass the cyclist, if the cyclist moves in a direction opposite to that of the train and if the speed of the cyclist is 5m/sec and the length of the cycle is 1 m? 9. 95 s e c b. 10 s e c c. 10. 05 s e c d. 12 s e c

If a runner takes as much time in running 20 metres as the car takes in covering 50 metres. The distance covered by the runner during the time the car covers 1 km is 400 m e t r e s b. 40 m e t r e s c. 440 m e t r e s d. none of these

Two trains of lengths 120 m and 90 m are running with speeds of 80 km/hr and 55 km/hr respectively towards each other on parallel lines. lf they are 90 m apart, after how many seconds they will cross each other? 5. 6 s e c b. 7. 2 s e c c. 8 s e c d. 9 s e c

A is 10 miles west of B. C is 30 miles north of B. D is 20 miles east of C. what is the distance from A to D? a. 10 miles b. 30 m i l e s c. 10 sqrt(10) m i l e s d. 10 sqrt(13) m i l e s e. 30 sqrt(2) m i l 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 120 metre long train is running at a speed of 90 k/hr. It will cross a railway platform 230 m long in 4 4/5s e con d s b. 7 s e con d s c. 9 1/5s e con d s d. 14 s e con d s