exam
Maths Puzzle
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:
A.
4.5 km/hr
B.
6 km/hr
C.
7 km/hr
D.
5 km/hr
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exam Other 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.
A.
3 km/hr
B.
2.5 km/hr
C.
4 km/hr
D.
3.5 km/hr
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?
A.
180 leaps
B.
270 leaps
C.
360 leaps
D.
90 leap