Volume and Surface Area Questions Practice Question and Answer
8 Q: If the areas of circular ring having inner and outer radius 8 cm and 12 cm respectively is equal to the total surface area of cylinder of radius R1 and height h, then h in terms of R1 will be :
827 060b6101727bd974fe7f5d7a5
60b6101727bd974fe7f5d7a5- 1$$ {40-R_1\over {R_1}}$$false
- 2$$ {40-R_1\over {R_1^{2}}}$$false
- 3$$ {40-R_1^{2}}\over R_1$$true
- 4None of thesefalse
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Answer : 3. "$$ {40-R_1^{2}}\over R_1$$"
Q: Find the area of triangle whose medians are 8 cm, 15 cm and 17 cm respectively?
869 060a7a50dc7f1592dd0d64cf3
60a7a50dc7f1592dd0d64cf3- 1$$20 cm^2$$true
- 2$$15 cm^2$$false
- 3$$24 cm^2$$false
- 4$$28 cm^2$$false
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Answer : 1. "$$20 cm^2$$"
Q: The radii of three concentric circles are in the ratio of 4 : 5 : 7. What is the ratio of the area between the two inner circles to that between the two outer circles?
723 0609cd380e941dd6183d59933
609cd380e941dd6183d59933- 14 : 7false
- 23 : 8true
- 34 : 5false
- 45 : 9false
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Answer : 2. "3 : 8"
Q: The diagonal of a square is equal to the side of an equilateral triangle. If the area of the square is $$ {18\sqrt{3}}$$ sq.cm. What is the area (in cm2) of the equilateral triangle ?
744 0609cd31fe941dd6183d59912
609cd31fe941dd6183d59912- 1$$ {54\sqrt{2}}$$false
- 2$$ {27\sqrt{2}}$$false
- 354false
- 427true
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Answer : 4. "27"
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?
702 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: In a circle of radius 17 cm, two parallel chords of lengths 30 cm. and 16 cm are drawn. If both the chords are on the same side of the center, then the distance between the chords is -
777 0609a6719f738a51c29ae2b02
609a6719f738a51c29ae2b02- 17 cm.true
- 217 cm.false
- 39 cm.false
- 423 cm.false
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Answer : 1. "7 cm. "
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 –
739 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: A straight line parallel to the base QR of the ∆PQR intersect PQ and PR at the points S and T respectively. If the area of the ∆PQT be 36 cm2 then area of the ∆PRS is:
708 060952c6b1a490e0a05cdf807
60952c6b1a490e0a05cdf807- 1$$ {18 {\ cm^{2}}}$$false
- 2$$ {36 {\ cm^{2}}}$$true
- 3$$ {28 {\ cm^{2}}}$$false
- 4$$ {48 {\ cm^{2}}}$$false
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