exam Maths Puzzle

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

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exam Other 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:

A.

4.5 km/hr

B.

6 km/hr

C.

7 km/hr

D.

5 km/hr P and Q start running in opposite directions (towards each other) on a circular track starting at diametrically opposite points. They first meet after P has run for 75m and then they next meet after Q has run 100 m after their first meeting. Assume that both of them are running a constant speed. The length of the track (in metre) is:

A.

70

B.

175

C.

250

D.

350