Radius of solid cylinder is 23 cm and height is 26cm. if three hemispheres each of radius 3.5 cm are removed from each base of the cylinder. Find the total surface area of the remaining solid?
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7335 cm2
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7315cm2
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7215cm2
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7325cm2
B
Correct answer
Explanation
Original cylinder: CSA = 2π(23)(26) = 2π×598. Each hemisphere removal creates a circular opening of area π(3.5)². Total surface area = curved surface area + 2(base area) - 6(area removed) + 3(hemisphere curved surfaces). Calculations lead to 7315 cm².