It is found that on walking 20 m towards a chimney in a horizontal line through its base, the elevation of its top…

CBSE Class 10 Maths PYQ · Applications of Trig · Double Triangle · 1 Mark · July 2023 · Standard

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231 Mark · July 2023 · Standard

It is found that on walking $20$ m towards a chimney in a horizontal line through its base, the elevation of its top changes from $30^\circ$ to $60^\circ$. The height of the chimney is :

(a)$20\sqrt{3}$ m
(b)$10\sqrt{3}$ m
(c)$\frac{20\sqrt{2}}{3}$ m
(d)$\frac{20}{\sqrt{3}}$ m

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(b) $10\sqrt{3}$ m

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It is found that on walking 20 m towards a chimney in a horizontal line through its base, the elevation of its top…

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