exam Maths Puzzle

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.

A.

10.5 km/hr

B.

11 km/hr

C.

10 km/hr

D.

12.5 km/hr

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exam Other Question
The circumference of the front wheel of a cart is 40 ft long and that of the back wheel is 48 ft long. What is the distance travelled by the cart, when the front wheel has done five more revolutions than the rear wheel?

A.

950 ft

B.

1450 ft

C.

1200 ft

D.

800 ft 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:

A.

700 km

B.

740 km

C.

720 km

D.

760 km