exam Maths Puzzle

A man sitting in train travelling at the rate of 50 km/hr observes that it takes 9 sec for a goods train travelling in the opposite direction to pass him. If the goods train is 187.5m long. Find its speed

A.

40 km/hr

B.

30 km/hr

C.

24 km/hr

D.

25 km/hr

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exam Other Question
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 Two places A and B are separated by a distance of 200 m. Ajay and Jay have to start simultaneously from A, go to B and return to A. In 10 s they meet at a place 10m from B. If Ajay is faster than Jay, in how much time, after they start, will Ajay return to A?

A.

19 sec

B.

200
21
sec

C.

400
21
sec

D.

190
21
sec