Exercise :: Volume and Surface Area - General Questions
- Volume and Surface Area - Important Formulas
- Volume and Surface Area - General Questions
- Volume and Surface Area - Data Sufficiency 1
- Volume and Surface Area - Data Sufficiency 2
1. | A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volume of the cone so formed is: |
|||||||||||||||||
Answer: Option A Explanation: Clearly, we have r = 3 cm and h = 4 cm.
Video Explanation: https://youtu.be/Njsid2mVwUY |
2. | In a shower, 5 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is: |
||||||||||||||||||||||
Answer: Option B Explanation: 1 hectare = 10,000 m2 So, Area = (1.5 x 10000) m2 = 15000 m2.
Video Explanation: https://youtu.be/dDbVuBzYop8 |
3. | A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is: |
|||||||||||||||||||||
Answer: Option C Explanation: 2(15 + 12) x h = 2(15 x 12)
Video Explanation: https://youtu.be/V8EQ1YIaH74 |
4. | 66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be: |
||||||||||||||||||||||||||||||||
Answer: Option A Explanation: Let the length of the wire be h.
|
5. | A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is: |
|||||||||||||||||||||||||
Answer: Option B Explanation: External radius = 4 cm, Internal radius = 3 cm.
|