Discussion

Explanation:

The distance between points A and B is 5 km.

Ram starts at 9 a.m. from A at a speed of 5 km/hr. So, he reaches B at 10:00 a.m.

When Ram reaches B (i.e. at 10.00 a.m., or 15 minutes after Shyam started from A), Shyam (running at a speed of 10 km/hr) is 15/60 × 10 = 2.5 km away from A.

Ram meets Shyam $\frac{2.5}{10+5}\times 60$ = 10 minutes after 10:00 a.m., i.e. at 10:10 a.m. 

Hence, option (b).

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