a solid iron sphere of radius r units cut into 4 identical solid quarter spheres. find the total surface area of the quarter sphere. Ans is = 2(pi)r^2
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total surface area of quarter sphere=2 area of 1/2part of circle +area of spherical part
=2x1/2pi.r^2+(4pi.r^2)/4
=pi.r^2+pi.r^2
=2pi.r^2
=2x1/2pi.r^2+(4pi.r^2)/4
=pi.r^2+pi.r^2
=2pi.r^2
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