Use reasoning to lead to the answer of the following question:
A boy runs 200 metres in 72 seconds. What is his speed ?\nOptions:\n(A) 10 km/hr\n(B) 14 km/hr\n(C) 20 km/hr\n(D) 12 km/hr\n(E) 24 km/hr

(A)
200/72 * 18/5 = 10 km/hr.

So, the final answer is (A)