hr. When will the owner overtake the thief from the starting point

1. 1 hr

2. 1.5 hr

3. 2 hr

4. 2.5 hr

View Answer

Correct Answer :

1.5 hr

Explanation :
No Explanation available for this question

A tower is 61.25m high. A rigid body is dropped from its top and at the same instant another body is thrown up-wards from the bottom of the tower with such a velocity that they meet in the middle of the tower. The velocity of projection of the second body is:

1. 24.5 m/s

2. 20 m/s

3. 25 m/s

4. 22 m/s

View Answer

Correct Answer :

24.5 m/s

Explanation :
No Explanation available for this question

A car travels first half distance between two places with a speed of 40 km/hr and rest of the half distance with a speed of 60 km/hr. The average speed of the car is:

1. 48 km/hr

2. 37 km/hr

3. 44 km/hr

4. 45 km/hr

View Answer

Correct Answer :

48 km/hr

Explanation :
No Explanation available for this question

A cyclist drove one kilometre, with the wind in his back, in three minutes and drove the same way back, against the wind in four minutes. If we assume that the cyclist always puts constant force on the pedals, how much time would it take him to drive one kilometre without wind

1. 7/3 min

2. 24/7 min

3. 17/7 min

4. 43/12 min

View Answer

Correct Answer :

24/7 min

Explanation :
No Explanation available for this question

A ship 77 km from the shore, springs a leak which admits to 9/2 tonnes of water in 11/2 minutes. 92 tonnes of water would sink it. But the pumps can throw out 12 tonnes of water per hour. Find the average rate of sailing so that the ship may just reach the shore as it begins to sink.

1. 10.5 km/hr

2. 11 km/hr

3. 10 km/hr

4. 12.5 km/hr

View Answer

Correct Answer :

10.5 km/hr

Explanation :
No Explanation available for this question

A train covered a certain distance at a uniform speed. If the train had been 6 km/hr faster, it would have taken 4 hour less than the scheduled time. And, if the train were slower by 6 km/hr, the train would have taken 6hr more than the scheduled time. The length of the journey is:

1. 700 km

2. 740 km

3. 720 km

4. 760 km

View Answer

Correct Answer :

720 km

Explanation :
No Explanation available for this question

Two identical trains A and B running in opposite direction at same speed tale 2 min to cross each other completely. The number of bogies of A are increased from 12 to 16. How much more time would they now require to cross each other

1. 40 sec

2. 50 sec

3. 60 sec

4. 20 sec

View Answer

Correct Answer :

20 sec

Explanation :
No Explanation available for this question

A boatman rows to a place 45 km distant and back in 20 hour. He finds that he can row 12 km with the stream in the same time as 4km against the stream. Find the speed of the stream.

1. 3 km/hr

2. 2.5 km/hr

3. 4 km/hr

4. 3.5 km/hr

View Answer

Correct Answer :

3 km/hr

Explanation :
No Explanation available for this question

A motorboat whose speed is 15 km/hr in still water goes 30km downstream and comes back in four and a half hours. The speed of the stream is:

1. 4.5 km/hr

2. 6 km/hr

3. 7 km/hr

4. 5 km/hr

View Answer

Correct Answer :

5 km/hr

Explanation :
No Explanation available for this question

A hare, pursued by a grey-hound is 20 of her own leaps ahead of him. While the hare takes 4 leaps, the grey-hound takes 3 leaps. 3 leaps of grey-hound is equal to 2 leaps of hare. In how many leaps will the grey-hound overtake the hare

1. 180 leaps

2. 270 leaps

3. 360 leaps

4. 90 leaps

View Answer

Correct Answer :

180 leaps

Explanation :
No Explanation available for this question

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