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Question

A right triangle with sides 6 cm, 8 cm and 10 cm is revolved about the side 8 cm. Find the curved surface of the solid so formed.

A
188.57
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B
190.8
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C
185.3
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D
181.56
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Solution

The correct option is A 188.57
AFTER DRAWING THE FIGURE WE COME TO KNOW THAT A CONE IF FORMED WHOSE
l = 10 cm , h = 8 cm , r = 6 cm
Curved surface of the solid (CONE )=πrl
A=πrl=22/7106=188.57cm2

404404_78197_ans_da9095cd8dfa49da9c9310f858419d39.png

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