The door of a building is in the form of a hemisphere its radius is 63 deci metre. find the cost of painting it at the rate of rupees 2 per square metre.

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Solution

Radius = 63 deci meter = 6.3 meter
surface area of the hemisphere = 2πr^2=2 π (6.3)^2=249.48 m^2
therefore cost of painting = 249.48×2 =498.96 rupees

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The door of a building is in the form of a hemisphere its radius is 63 deci metre. find the cost of painting it at the rate of rupees 2 per square metre.

Radius = 63 deci meter = 6.3 meter surface area of the hemisphere = 2πr^2=2 π (6.3)^2=249.48 m^2 therefore cost of painting = 249.48×2 =498.96 rupees

Radius = 63 deci meter = 6.3 meter
surface area of the hemisphere = 2πr^2=2 π (6.3)^2=249.48 m^2
therefore cost of painting = 249.48×2 =498.96 rupees