Volume and Surface Area Practice Question and Answer
8 Q: If the ratio of the areas of two similar triangle ABC and DEF is 36:81 and EF = 6.9 cm., then BC is equal to –
1229 0609a642ef738a51c29ae2450
609a642ef738a51c29ae2450- 14.6 cm.true
- 26.4 cm.false
- 34 cm.false
- 46 cm.false
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Answer : 1. "4.6 cm. "
Q: What will be the area (cm2) of the curved surface of an elliptical cylinder whose height and diameter are 10 cm and 8 cm respectively?
1225 05f6d79f8f9079a64e3be1fc4
5f6d79f8f9079a64e3be1fc4- 120 πfalse
- 280 πtrue
- 3160 πfalse
- 440 πfalse
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Answer : 2. "80 π"
Q: The volume of a solid right circular cone is 600 π cm3, and the diameter of its base is 30 cm. The total surface area (in cm2) of the cone is:
1224 05fc0dcbe96415e6951a97db2
5fc0dcbe96415e6951a97db2- 1480 πtrue
- 2255 πfalse
- 3472 πfalse
- 4496 πfalse
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Answer : 1. "480 π"
Q: The diagonal of a square is 14 cm. What will be the length of the diagonal of the square whose area is double of the area of first square?
1221 0609cd2dc4587a93a1dcdd83c
609cd2dc4587a93a1dcdd83c- 1$$ {28\sqrt{2}{\ cm}}$$false
- 2$$ {14\sqrt{2}{\ cm}}$$true
- 328false
- 4$$ {21\sqrt{2}{\ cm}}$$false
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Answer : 2. "$$ {14\sqrt{2}{\ cm}}$$"
Q: The volume of a solid right circular cylinder is 5236 cm3, and its height is 34 cm. What is its curved surface area (in cm2)?
1217 06051cb6aa37d522d6c1528d1
6051cb6aa37d522d6c1528d1- 11496true
- 21573false
- 31650false
- 41804false
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Answer : 1. "1496"
Q: The ratio of the sides of a triangle is 3: 4: a and the area of this triangle is 216 square cm. And the perimeter of this triangle is 72 cm. Then the value of a will be -
1215 05f80177988aba328edadbd87
5f80177988aba328edadbd87- 18 cmfalse
- 25 cmtrue
- 36 cmfalse
- 412 cmfalse
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Answer : 2. "5 cm"
Q: The vertices of the 1 cm side are cut from each corner of a square with a side of 4.5 cm. Find the circumference and area of the octagon formed?
1212 05f87f977e6aa3e1d0bcbcc73
5f87f977e6aa3e1d0bcbcc73- 1$$ {5\sqrt{2}}{\ cm};{18.25{\ cm^{2}}}$$false
- 2$$ {(5+4\sqrt{2})}{\ cm}; {18.25 \ cm^{2}}$$false
- 3$$ {(10+4\sqrt{2})}{\ cm}; {18.25 \ cm^{2}}$$true
- 416 cm and 16 sq.cmfalse
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Answer : 3. "$$ {(10+4\sqrt{2})}{\ cm}; {18.25 \ cm^{2}}$$"
Q: If the height and the radius of the base of a cone are both doubled, the volume of the cone becomes _______ of its previous volume.
1208 0642821ab72ca731a99107e82
642821ab72ca731a99107e82- 14 timesfalse
- 28 timestrue
- 33 timesfalse
- 46 timesfalse
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