GATE | GATE CS 2013 | Question 64

A tourist covers half of his journey by train at 60 km/h, half of the remainder by bus at 30 km/h and the rest by cycle at 10 km/h. The average speed of the tourist in km/h during his entire journey is
(A) 36
(B) 30
(C) 24
(D) 18


Answer: (C)

Explanation: Let total distance be D

Total Time = D(1/2*60 + 1/4*30 + 1/4*10) = D/24

Average Speed = Total distance / Total time = 24


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