The internal and external diameters of a hollow hemispherical vessel are 24 cm and 25 cm
respectively. If the cost of painting 1 cm2 of the surface area is Rs.0.05, find the total cost
of painting the vessel all over.
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Answer:
inner radius ( r ) = 12 cm
external radius ( R ) = 12.5 cm
total surface area to be painted = π ( 2R² + 2 r² + R² - r² )
π ( 3R² + r² )
= 1925.78 cm²
Total cost of painting = 1925.78 * 5 / 100
= Rs 96.28
PLEASE MARK BRAINLIEST
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