Surface Area- Sphere n hemisphere
Q1. Find the surface area of sphere of radius 7 cm. Q2. Find curved and total surface area for hemisphere with radius 21 cm. Worksheet-Surface Area Q3. The surface area of sphere is 5544 sq cm. Find its diameter. Q4. The dome of the building is in the form of hemisphere. Its radius is 63 dm. Find the cost of painting it at the rate of $2 per sq m. Q5. The radius of balloon increases from 7cm to 14 cm as air is being pumps into it. Find the ratio of surface areas of the balloon in the two cases.
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