Class 9 – Sphere

Question 6: Find the radius of a sphere whose surface area is 154 cm2. Question 5 Question 7

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Question 5: A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of ` 16 per 100 cm2. Question 4 Question 6

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Question 4: The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases. Question 3 Question 5

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Question 3: Find the total surface area of a hemisphere of radius 10 cm. (Use π = 3.14) Question 2 Question 4

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Question 2: Find the surface area of a sphere of diameter: (i) 14cm (ii) 21cm (iii) 3.5m Question 1 Question 3

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Question 1: Find the surface area of a sphere of radius: (i) 10.5cm (ii) 5.6cm (iii) 14cm Ex: 13.3 | Question 8 Question 2

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