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A rocket is in the form of circular closed at the ler end and a cone of same radius is attached to the top.The radius of the clylinder is 2.5m ,it's height is 21m and the slant height of the cone is 8m Find the T.S.A of rocket
Asked by ybproduction256 | 27 Nov, 2023, 00:26: AM
answered-by-expert Expert Answer
Let R = 2.5 m and H = 21 m be the radius and height of cylindrical part of rocket respectively .
 
Let L = 8 m be the slant  height of cone .
 
Total surface area = π R2 + (2πR) H + π R L
 
where the first term is the area of bottom surface , second term is the  area of curved surface
of cylinder and the third term is lateral surface area of cone .
 
Total surface area = π R ( R + 2 H + L )
 
Total surface area = π × 2.5 ( 2.5 + 42 + 8 ) m2 = 412 m2 
Answered by Thiyagarajan K | 27 Nov, 2023, 08:28: AM

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