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Volume & Surface Areas

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71.

Volume of cone with surface area 7cm and height 14cm is

Answer: C

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72.

If diameter of a cylinder is 5cm and volume of cylinder is 650cm⊃3; then height of cylinder is

Answer: C

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73.

Ramesh has a rectangular wooden block. P, Q and R are the areas of the three adjacent and contiguous faces of the block. If we denote its volume by S, then which of the following is true for sure?

Answer: C

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74.

If two solid hemispheres of the same base radius r are joined together along their bases, then curved surface area of this new solid is

Answer: A

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75.

If a right circular cone hs radius 4 cm and slant height 5 cm then what is its volume?

Answer: A

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Answer: A

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77.

By converting 0.8m⊃3; into cm⊃3;, answer will be

Answer: C

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78.

If a rectangular cuboid is 15cm long, 10cm wide and 9cm high with volume of 500cm⊃3; then surface area of cuboid is

Answer: A

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79.

Three solid metallic balls of diameter 3cm, 4cm and 5m are melted into a solid sphere. The radius of new sphere is

Answer: C

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80.

VPQRS is rectangle based pyramid where PQ = 30cm, QR = 20cm and volume is 2000cm⊃3;, height is

Answer: C

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