volumes Mcqs
2. The area of the cardboard(in cm<sup>2
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A. 1390 cm2

B. 695 cm<sup>2</sup>

C. 1280 cm<sup>2</sup>

D. 1220 cm<sup>2</sup>

7. The surface area of a cube is 726m<sup>2
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A. 1542 m<sup>3</sup>

B. 1452 m<sup>3</sup>

C. 1331 m3

D. 1300 m<sup>3</sup>

9. The radius of a circular cylinder is the same as that of a sphere. Their volumes are equal. The height of the cylinder is________?
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A. Equal to its radius

B. Equal to its diameter

C. 4/3 times its radius

D. 2/3 times its radius

30. The slant height of a cone is 12 cm and radius of the base is 4cm, find the curved surface of the cone.
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A. 48 ? cm2

B. 24 ? cm<sup>2</sup>

C. 36 ? cm<sup>2</sup>

D. 74 ? cm<sup>2</sup>

31. The area of a base of a cone is 30 cm<sup>2
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A. 50 cm<sup>3</sup>

B. 40 cm<sup>3</sup>

C. 120 cm<sup>3</sup>

D. 60 cm3
45. The edge of a cube is 2a cm. Find its surface?
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A. 24a2cm2

B. 12a<sup>2</sup>cm<sup>2</sup>

C. 6a<sup>2</sup>cm<sup>2</sup>

D. 8a<sup>2</sup>cm<sup>2</sup>

47. The radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?
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A. 18 ?r<sup>2</sup>sq units

B. 3 ?r<sup>2</sup>sq units

C. 12 ?r2sq units

D. 6 ?r<sup>2</sup>sq units

48. The area of the floor of a room is 20 m<sup>2
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A. 60 m3

B. 100 m<sup>2</sup>

C. 400 m<sup>3</sup>

D. 450 m<sup>3</sup>