Question

47. From the top of a hill 200 root3m high, the angle of depression of a ship moving towards
the hill is 30°. After 2 minutes its angle of depression becomes 60°, then the speed of
the ship assuming it to be uniform is:

(A) 10 km/hr
(B)12 km/hr (C) 14 km/hr (D) 18 km/hr
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Answer 1

hope it's clear......