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Viva Voce

Question 1:
What is a hemisphere ?
Answer: Half of a sphere is called a hemisphere.

Question 2:
How many hemispheres make a sphere ?
Answer: Two

Question 3:
What is the curved surface area of a hemisphere ?
Answer:

Question 4:
What is the curved surface area of a sphere ?
Answer:

Question 5:
What is the total surface area of a hemisphere ?
Answer:

Question 6:
What is the surface area of a sphere of diameter 14 cm ?
Answer: 616 cm
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Question 7:
What is the radius of a hemisphere whose total surface area is 942 cm? [Takeπ = 3.14 ]
Answer: 10 cm

Question 8:
What is the curved surface area of a sphere of radius 3 cm ? ’
Answer: 36 cm
2

Multiple Choice Questions

Question 1:
Surface area of a sphere of diameter 21 cm is
(a) 1386 cm (b) 1368 cm (c) 1683 cm (d) 1863 cm
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Question 2:
Find the total surface area of a hemisphere of radius 10cm. [Taken = 3.14]
(a) 924 cm (b) 492 cm (c) 942 cm (d) None
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