A solid cube of side 7 m is melted to make a cone of height 11 m, find the radius of the base & lateral surface area of the cone.
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Step-by-step explanation:
vol of cube= vol.of cone
343 = 1/3 π r^2 *11
343*7*3/22*11= r^2
3601.5 = r^2
r= ✓ 3601.5
= 60.01
l= ✓r^2+h^2
= ✓ 60.01^2 + 11^2
= ✓3600+121
= ✓3721
= 61
CSA = 22/7* 60.01*61
= 11502.85 cm^2
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