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in Trigonometry by (29.9k points)
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If the elevation of the sun changes from 30° and 60° then the difference between the lengths of shadows of a pole 15m high, is

(a) 7.5m

(b) 15m

(c) 10√3m

(d) 5√3m

1 Answer

+1 vote
by (30.3k points)
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Best answer

Let AB be the pole and AC and AD be its shadows.

We have:

∠ACB = 30°, ∠ADB = 60° and AB = 15m

∴ Difference between the lengths of the shadows

= AC - AD = \(15\sqrt{3}-5\sqrt{3}=10\sqrt{3}m\)

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