A cubical blockbof side 7cm is surrounded by a hemisphere.What is the greatest diameter the hemisphere can have? Find the surface area of solid
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S = 7cm
so, d=7 , r = 7/2 cm
so, surface area = csa of cube + csa of hemisphere - area of circle
=6s^2 + 2*22/7*r^2 - 22/7*r^2
6*7*7 + 2*22/7*7/2*7/2 - 22/7*7/2*7/2
294 + 77 - 77/2
294 + 77/2
(588 + 77)/2
665/2
ans=332.5cm^2
so, d=7 , r = 7/2 cm
so, surface area = csa of cube + csa of hemisphere - area of circle
=6s^2 + 2*22/7*r^2 - 22/7*r^2
6*7*7 + 2*22/7*7/2*7/2 - 22/7*7/2*7/2
294 + 77 - 77/2
294 + 77/2
(588 + 77)/2
665/2
ans=332.5cm^2
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