Volume and Surface Area Questions Practice Question and Answer
8 Q: A regular hexagon has a side of 4 cm. Find its area. (in sq. cm)
1656 0609528c61a490e0a05cde328
609528c61a490e0a05cde328- 1$$ {24\sqrt{3}}$$true
- 2$$ {18\sqrt{3}}$$false
- 3$$ {36\sqrt{3}}$$false
- 4None of thesefalse
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Answer : 1. "$$ {24\sqrt{3}}$$"
Q: The ratio between the length and breadth of a rectangular park is 3: 2. If a man cycling along the boundary of the park at the speed of 12 Km./hr. completes one round in 8 min, then the area of the park in sq.m is –
1652 0600a8bfa7cf1e8512ed33877
600a8bfa7cf1e8512ed33877- 115360false
- 230720false
- 3153600true
- 4307200false
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Answer : 3. "153600"
Q: The length of a rectangle is 6 cm more than its width and its perimeter is 100 cm. If the area of this rectangle is closest to the area of a circle, then what is the circumference of that circle?
1649 0602e05409f2a38430909bb32
602e05409f2a38430909bb32- 1110 cmfalse
- 2132 cmfalse
- 366 cmfalse
- 488 cmtrue
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Answer : 4. "88 cm"
Q: In the given figure find out the area of circle?
1648 05ef054fe7cd71c7944696a1f
5ef054fe7cd71c7944696a1f- 148π sq cmfalse
- 250π sq cmfalse
- 3100π sq cmtrue
- 4200π sq cmfalse
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Answer : 3. "100π sq cm"
Q: A solid metallic cylinder of base radius 5 cm and height 7 cm is melted to form cones, each of height 1 cm and base radius 1 mm. Find the number of cones?
1647 05ee9a1f7b1ffa91fd4a38bec
5ee9a1f7b1ffa91fd4a38bec- 153500false
- 249500false
- 351500false
- 452500true
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Answer : 4. "52500"
Q: A semicircle is folded to make a cone. Find the height (in cm) of the cone if diameter of the semicircle is 28 cm?
1630 0601a4f64552e5f41f7b07047
601a4f64552e5f41f7b07047- 1$$ {7\sqrt{3}}$$true
- 2$$ {14\sqrt{3}}$$false
- 3$$ {7\sqrt{5}}$$false
- 4$$ {7\sqrt{13}}$$false
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Answer : 1. "$$ {7\sqrt{3}}$$"
Q: A right triangle with sides 5 cm, 12 cm and 13 cm is rotated about the side 12 cm to from a cone. The volume of the cone so formed is :
1627 060c08c42e3298a2dec40d26d
60c08c42e3298a2dec40d26d- 1$$ {81 π \ cm^{3}}$$false
- 2$$ {100 π \ cm^{3}}$$true
- 3$$ {91 π \ cm^{3}}$$false
- 4$$ {110 π \ cm^{3}}$$false
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Answer : 2. "$$ {100 π \ cm^{3}}$$"
Q: The ratio of the areas of two isosceles triangles having the same vertical angle is 1 : 9.The ratio of their heights is -
1626 0611625197c2f633654de52c1
611625197c2f633654de52c1- 11 : 3true
- 21 : 9false
- 33 : 1false
- 41 : 81false
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