Volume and Surface Area Practice Question and Answer
8 Q: If the length of the diagonal of a square is $${ 10\sqrt{2}}$$ cm, then what will be the area of the square?
1648 0610c00e7997056628330e202
610c00e7997056628330e202- 1200 cm2false
- 2100 cm2true
- 3$${ 100\sqrt{2}}$$false
- 450 cm2false
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Answer : 2. "100 cm2"
Q: The ratio of the areas of two circles is 16: 25. What will be the ratio of their circumferences?
1638 05f76bab1e487e60dced7c88c
5f76bab1e487e60dced7c88c- 14 : 5true
- 23 : 2false
- 34 : 9false
- 49 : 4false
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Answer : 1. "4 : 5 "
Q: In the given figure if each of the outer circles have radii ‘R’, then the radius of the inner circle will be:
1637 060b70e3f2f692872ec8cf7cc
60b70e3f2f692872ec8cf7cc- 1$$ {2\over ({\sqrt{2}+1})R}$$false
- 2$$ {1\over {\sqrt{2}}}R$$false
- 3$$ {(\sqrt{2}-1)R}$$true
- 4$$ {\sqrt{2}R}$$false
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Answer : 3. "$$ {(\sqrt{2}-1)R}$$"
Q: A wall is the form of a trapezium with height 8 m and parallel sides being 5 m and 10 m. What is the cost of painting the wall, if the rate of painting is Rs. 50 per square meter ?
1632 05ef055a07cd71c7944696a50
5ef055a07cd71c7944696a50- 1Rs.5000false
- 2Rs.3000true
- 3Rs.6000false
- 4Rs .4000false
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Answer : 2. "Rs.3000"
Q: Area of a rectangle is equal to the area of a circle whose radius is 14 cm. If the breadth of the rectangle is 22 cm, what is its length?
1632 05fd9c2a5079b5044b465140d
5fd9c2a5079b5044b465140d- 124 cmfalse
- 228 cmtrue
- 326 cmfalse
- 4Cannot be determinedfalse
- 5None of thesefalse
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Answer : 2. "28 cm"
Q: The height of a cone is 16 cm and radius of its base is 30 cm. If the rate of painting it is Rs.14/cm2, then what will be the total cost in painting the curved surface of cone from outside?
1630 0610c067aa0824f7eeb5cabf0
610c067aa0824f7eeb5cabf0- 1Rs. 42220false
- 2Rs. 44880true
- 3Rs. 36820false
- 4Rs.46540false
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Answer : 2. "Rs. 44880"
Q: The length of the diagonal of a square is 'a' cm. Which of the following represents the area of the square (in sq. cm)?
1630 05ed9d7d6f528050f91500c47
5ed9d7d6f528050f91500c47- 12afalse
- 2a\√2false
- 3$$a^2\2$$true
- 4$$a2\4$$false
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Answer : 3. "$$a^2\2$$"
Q: Find the area of a white sheet required to prepare a cone with a height of 21cm and the radius of 20cm.
1629 05ee9a0a9109b5d6e01625396
5ee9a0a9109b5d6e01625396- 1$$ {3080}cm^2$$true
- 2$$ {2300}cm^2$$false
- 3$$ {3460}cm^2$$false
- 4$$ {3600}cm^2$$false
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