A boat starts from A and moves towards B. Another boat from B, with the same speed as that of first boat, starts moving towards A. They meet at a point which is 20 km towards B from exactly half-way of A to B and the distance between A and B is 120 km. What is the ratio of speed of boat to that of water?
Explanation:
It is clear that the water flow is from A to B.
Distance travelled by boat starting from A = 80 kms.
Distance travelled by boat starting from B = 40 kms.
Since time travelled is same for both the boats:
80Vb+Vw=40Vb-Vw
⇒ Vb = 3Vw
⇒ Vb : Vw = 3 : 1
Hence, option (c).
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