A solid is a cube of edge 7 cm with a hemisphere of radius 3.5 cm fixed (sitting) on the top face. The surface area to be painted = TSA of cube - base circle of hemisphere + curved surface of hemisphere. Find it in cm^2. (Take π = 22/7) (CSA = curved surface area, TSA = total surface area)

Question

Accepted Answer

332.5. TSA cube = 6*7^2 = 294. Base circle = π*r^2 = (22/7)*12.25 = 38.5. Hemisphere CSA = 2*π*r^2 = 77. Total = 294 - 38.5 + 77 = 332.5 cm^2.

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More Class 10 Surface Area of Combined Solids practice

A solid is a cube of edge 7 cm with a hemisphere of radius 3.5 cm fixed (sitting) on the top face. The surface area to be painted = TSA of cube - base circle of hemisphere + curved surface of hemisphere. Find it in cm2. (Take π = 722​) (CSA = curved surface area, TSA = total surface area)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Surface Area of Combined Solids practice