In a 800 metre race, `A` defeated `B` by 15 seconds. If `A ' s` speed was 8 km/hr, the speed of `B` was `(16)/(27)k m//h r` (b) `(27)/(16)k m//h r` (c) `7(17)/(25)k m//h r` (d) `8(17)/(25)k m//h r`

A car travelling with 5/7 of its actual sped covers 42 km in 1 hr 40 min 48 sec. find the actual speed of the car. 17 6/7k m//h r b. 25 k m//h r c. 30 k m//h r d. 35 k m//h r

A man travels 600 km by train at 80 km/hr, 800 km by ship at 40 km/hr, 500 km by aeroplane at 400 km/hr and 100 km by car at 50 km/hr. What is the average speed for the entire distance? a. 60 k m//h r b. 62 k m//h r c. 60 5/(123) k m//h r d. 6 5/(123)k m//h r

A train passes a platform 90 m long in 30 seconds and a man standing on the platform in 15 second. The speed of the train is a. 12. 4 k m//h r b. 14. 6 k m//h r c. 18. 4 k m//h r d. 121. 6 k m//h r

A man can row 9 1/3 kmph in still water and finds that it takes him thrice as much time to row up than as to row down the same distance in the river. The speed of the current is : a. 3 1/3 k m//h r b. 3 1/9k m//h r c. 4 2/3k m//h r d. 4 1/2k m//h r

A train travels at a speed of 30 km/hr for 12 minutes and at a speed of 4 km/hr for the next 8 minutes. The average speed of the train for this journey is 30 k m//h r b. 36 k m//h r c. 37. k m//h r d. 48 k m//h r

A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of the second train in 48 k m//h r b. 54 k m//h r c. 66 k m//h r d. 82 k m//h r

A car covers a distance from Town I to Town II at the speed of 56 km/hr and from Town II to Town I at the speed of 53 km/hr. what is the average speed of the car? 53. 5 k m//h r b. 54 k m//h r c. 55 k m//h r d. 5. 5 k m//h r e. none of these

A train 75 m long overtook a person who was walking at the rate of 6 km/ hr in the same direction and passed him in 7 1/2 seconds. Subsequently, it overtook a second person and passed him in 6 3/4 seconds. At what rate was the second person travelling? 1 k m//h r b. 2 k m//h r c. 5 k m//h r d. 4 k m//h r

A man can reach a certain place in 30 hours. If the reduces his speed by1/(15)t h he goes 10 km less in that time. Find his speed. 4 k m//h r b. 5 k m//h r c. 5 1/2k m//h r d. 6k m//h r