A man walks at a speed of 3 km/hr and runs at a speed of 9 km/hr. How much time will the man require to cover a distance of 18 km, if he completes half of the distance, i.e., (9) km on foot and the other half by running?\nOptions:\n(A) 4\n(B) 5\n(C) 6\n(D) 8\n(E) 9 Let's think first. Stream of consciousness:
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Required time = (9)/3 + (9)/9 = 4 hours.
So, the answer is (A).
Assistant