The ratio of total surface area and volume of a sp | Volume and Surface Area Questions & Answers

Q:

$Find the surface area (in {cm}^{2}) of a sphere of diameter 28 cm .$

A) 3422	B) 3852
C) 2464	D) 3550

Answer & Explanation Answer: C) 2464

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3 18492

Q:

What is the measure of an interior angle of a regular polygon of 8 sides?

A) 140	B) 144
C) 135	D) 150

Answer & Explanation Answer: C) 135

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0 9384

Q:

Find the volume (in cm3) of a right circular cone of diameter 7 cm and height 7 cm.

A) 69.06	B) 16.43
C) 11.15	D) 89.83

Answer & Explanation Answer: D) 89.83

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0 14046

Q:

∆PQR is right angled at Q. If m∠P = 60 deg, then find the value of (secR + 1/2).

A) (2√2+√3)/2	B) (√3+4)/2√3
C) √3+2	D) 5/6

Answer & Explanation Answer: B) (√3+4)/2√3

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0 9814

Q:

Find the volume (in cm3) of a hemisphere of diameter 7 cm.

A) 77	B) 63
C) 89.83	D) 54.13

Answer & Explanation Answer: C) 89.83

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0 10342

Q:

In ΔPQR measure of angle Q is 90 deg. If tanP = 24/7, and PQ = 14cm, then what is the length (in cm) of side QR?

A) 50	B) 20
C) 26	D) 48

Answer & Explanation Answer: D) 48

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1 575

Q:

Find the surface area (in sq.cm) of a sphere of diameter 14 cm.

A) 616	B) 4699
C) 8628	D) 6922

Answer & Explanation Answer: A) 616

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3 14657

Q:

If the edge of a cube is increased by 3 cm, the volume will increase by 657 cub.cm. What then is the original length of each edge of the cube?

A) 9 cm	B) 6 cm
C) 8 cm	D) 7 cm

A) 31276	B) 36194
C) 25182	D) 33264

The ratio of total surface area and volume of a sphere is 1 : 7. This sphere is melted to form small spheres of equal size. The radius of each small sphere is 1/6th the radius of the large sphere. What is the sum (in cm2) of curved surface areas of all small spheres?

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