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Question

On the top of a hemispherical dome of radius rr

A

B

C

D

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Text SolutionText solutionverified iconVerified

PQ = h is a pole standing on the top of hemispherical dome of radius r. the elevation of top Q as seen from A is .
                 ...(3)
On walking AB = d, the top is just-visible from B which means that BQ is a tangent touching at R say, OR is normal. Also (given) and .
The angle which are clearly have been marked.
 and
Hence from right angled we have

or      
or                    ...(2)
From (1)       by (2)
                   ...(3)
.                 by (2) and (3)
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Question Text
On the top of a hemispherical dome of radius rr
Answer TypeText solution:1
Upvotes150