The dome of a building is in the form of a hemisphere of radius 49 decimeter find the cost of painting it at the rate ruppes 8 per square metre
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radius = 49 dm = 4.9 m
curved surface area of hemisphere = 2×22/7×4.9×4.9
= 150.92 m²
Cost of painting it at 8 rupee per m² = 150.92×8 =
=1207.36 Rs
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