Volume and Surface Area Practice Question and Answer
8 Q: What is the area of an equilateral triangle having altitude equal to $$5\sqrt{3}$$cm.
772 05ef052c87cd71c794469687d
5ef052c87cd71c794469687d- 1$$25\sqrt{3}$$true
- 2$$45\sqrt{3}$$false
- 345false
- 440false
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Answer : 1. "$$25\sqrt{3}$$"
Q: An iron pipe 20 cm long has exterior diameter 25 cm. If the thickness of the pipe is 1 cm, then the whole surface area of the pipe?
905 05f59d091b772fe2f8b223a57
5f59d091b772fe2f8b223a57- 1$$ {3168\ cm^{2}}$$true
- 2$$ {3186\ cm^{2}}$$false
- 3$$ {3200\ cm^{2}}$$false
- 4$$ {3150\ cm^{2}}$$false
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Answer : 1. "$$ {3168\ cm^{2}}$$"
Q: The area of triangle is half the area of square. The perimeter of the square is 224 cm. What is the area of triangle?
1314 05d4aa1bf11160f2052371576
5d4aa1bf11160f2052371576- 11856 cm2false
- 21658 cm2false
- 31558 cm2false
- 41586 cm2false
- 5None of thesetrue
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Answer : 5. "None of these"
Explanation :
given 4a=224,
a=56, so that Area of square is=a2=56*56
so that Area of Triangle is a2/2=1568
Q: What is the volume of a cube whose side is 7.5 cm?
1119 05e325343d0aa6f23a8fc4412
5e325343d0aa6f23a8fc4412- 1421.875 cm3true
- 2759.375 cm3false
- 3631.81 cm3false
- 4210.94 cm3false
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Answer : 1. "421.875 cm3"
Q: Diameter of a cycle wheel is 14 cm. A cyclist takes 30 minutes to reach a destination at a speed at 11 km/h. How many revolutions will the wheel make during the journey?
2316 15e4669b573b6222f383a033b
5e4669b573b6222f383a033b- 112500true
- 215000false
- 317750false
- 420000false
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Answer : 1. "12500"
Q: What is the total CSA of cone whose radius is 3 cm and height is 4 cm?
811 05e9d2b8b772f97276f50ca91
5e9d2b8b772f97276f50ca91- 1$$ { 24 π cm^2}$$true
- 2$$ { 25 π cm^2}$$false
- 3$$ { 28 π cm^2}$$false
- 4$$ { 20 π cm^2}$$false
- 5None of thesefalse
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Answer : 1. "$$ { 24 π cm^2}$$"
Q: One side of the rectangular ground is 8m and its diagonal is 17m. Find the area of the ground?
883 05ee9a728bc81cb2528ec0497
5ee9a728bc81cb2528ec0497- 1150 m²false
- 2140 m²false
- 3130 m²false
- 4120 m²true
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Answer : 4. "120 m²"
Q: A cuboidal block of 6 cm × 9 cm ×12 cm is cut into exact number of equal cubes. The least possible number of cubes will be:
996 05f59d0dc69ed13038c147be9
5f59d0dc69ed13038c147be9- 16false
- 29false
- 324true
- 430false
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