6.
The Radius at the base of a conical tent is 7 metres. If the slant height of the tent is 15 metres, what is the area of the canvas required to make the tent?
- A.330 sq.cm
- C.300 sq.cm
- B.30 sq.cm
- D.60 sq.cm
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
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| Area of canvas required = C.S.A of cone | ||||||||||
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7.
| The diagonal of a cube is 2 | 3 | metres. Its volume in cubic centimeter will be |
- A.0.000008
- C.8000000
- B.8
- D.80000
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
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8.
A hemisphere of radius 6 cm is case into a right circular cone of height 75 cm. What is the radius of the base of cone?
- A.3 cm
- C.2.6 cm
- B.2.4 cm
- D.1.4 cm
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Let r1 be the radius of the hemisphere and r2 be the radius of the cone. | ||||||||||||||||||||||||||||||||||||||||
| Volume of hemisphere = Volume of cone | ||||||||||||||||||||||||||||||||||||||||
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9.
Find the slant height of the cone whose height is 4.8 cm and the diameter of base is 4 cm.
- A.6.2 cm
- C.5.2 cm
- B.7.2 cm
- D.4.2 cm
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| h = 4.8 cm, r = 2 cm | |||||||||
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10.
2.2 cu. Cm of brass is to be drawn into cylindrical wire. ¼ cm in diameter. What will be the length of the wire?
- A.448 m
- C.400 m
- B.420 m
- D.432 m
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Let the length of the wire be = l cm | ||||||||||||||||
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