Trigonometry

Geometry Level 3

There are 2 temples, one on each bank of the river, just opposite to each other. One of the temples A is 40 m 40 \text{ m} high. As observed from the top of this temple A, the angle of depression of the top and the foot of the other temple B are 1 2 3 0 12^\circ 30' and 2 1 4 8 21^\circ 48' respectively. Find the height of the temple B in meters.


The answer is 17.83.

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