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Question


There is a ship which is moving away from an iceberg 150 m high, takes 2 mins to change the angle of elevation of the top of the iceberg from 600 to 450. What is the speed of the ship?


Options:
A .   2.46 kmph
B .   1.3 kmph
C .   1.9 kmph
D .   1.7 kmph
Answer: Option C
:
C

There Is A Ship Which Is Moving Away From An Iceberg 150 M H...
In a 45-45-90 triangle, sides are in the ratio 1:1:2
Thus OB= 150 
In a 30-60-90 triangle, sides are in the ration 1:3:2
Thus OA= 1503
Distance travelled in 2 mins = AB
                                 = 150- 503 = 63.4 m
                                 speed = (63.42)×(601000)= 1.9 kmph



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