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From a point on a bridge across a river,...

From a point on a bridge across a river, the angles of depression of the banks on opposite sides, of the river are 30° and 45° respectively. If the bridge is at a height of 3 m from the banks, find the width of the river.

A

5.83 metre

B

6.83 metre

C

5.76 metre

D

6.87 metre

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The correct Answer is:
B
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Miscellaneous; Ex-1There are two temples, one on each bank of the river just opposite to each other.One temple is 54m high.From the top of this temple.the angle of the depression of the top and the foot of the other temple is 30^(0) and 60^(0) respectively.Find the width of the river and the height of the other temple.

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