Discussion
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- Question
The volume of a spherical balloon is increased by 700%. What is the percentage increase in its surface area?
Options- A. 300%
- B. 400%
- C. 450%
- D. 500%
- Correct Answer
- 300%
- 1. In ?PQR, PQ = PR = 18 cm, AB and AC are parallel to lines PR and PQ respectively. If A is the mid-point of QR, then what is the perimeter (in cm) of quadrilateral ABPC?
Options- A. 18
- B. 28
- C. 32
- D. 36 Discuss
- 2. If ?ABC is an equilateral triangle of side 16 cm, then the length of altitude is
Options- A. 2?3 cm
- B. 4?3 cm
- C. 8?3 cm
- D. 5?3 cm Discuss
- 3. The base of a pyramid is a rectangle whose length and breadth are 16 cm and 12 cm respectively. If the length of all the lateral edges passing through the vertex of the right rectangular pyramid is 26 cm, then find the volume of the pyramid in cubic centimeter?
Options- A. 1536
- B. 1024
- C. 718
- D. 2072 Discuss
- 4. A cuboid of dimension 24cm x 9cm x 8 cm is melted and smaller cubers are of side 3 cm is formed.find how many such cubes can be formed ?
Options- A. 64
- B. 56
- C. 48
- D. 40 Discuss
- 5. The cost of the paint is rs.36.50 per kg. if 1kg of paint covers 16sq.ft, how much will it cost to paint outside of a cube having 8 feet each side
Options- A. Rs.962
- B. Rs.672
- C. Rs.546
- D. Rs.876 Discuss
- 6. Considering two opposite vertices of a square of side ?a? as centres, two circular arcs are drawn within the square joining the other two vertices, thus forming two sectors. What is the common area in these two sectors?
Options- A. a2?+12
- B. a
- C. a2?2-1
- D. ?a/2 Discuss
- 7. The area of a semicircle is 1925 sq.cm. Calculate its perimeter (in cm).
Options- A. 360
- B. 80
- C. 160
- D. 180 Discuss
- 8. At what point does the line 3x + y = -6 intercept the x-axis?
Options- A. (2,0)
- B. (-2,0)
- C. (0,-6)
- D. (0,6) Discuss
- 9. The volume of metallic cylindrical pipe of uniform thickness is 748 c.c. Its length is 14 cm and its external radius is 9 cm. The thickness of the pipe is
Options- A. 0.5 cm
- B. 1.5 cm
- C. 1 cm
- D. 2 cm Discuss
- 10. If the volume of a cylinder is 3850 cubic cm and height is 25 cm, what is its radius? (Take ? = 22/7)
Options- A. 7 cms
- B. 14 cms
- C. 10 cms
- D. 3.5 cms Discuss
Volume and Surface Area problems
Search Results
Correct Answer: 36
Correct Answer: 8?3 cm
Correct Answer: 1536
Correct Answer: 64
Explanation:
Volume of cuboid = (24 x 9 x 8) cm = 1728 cu.cm
Volume of small cube = (3 x 3 x 3) cm = 27 cu.cm
So, No. of small cubes formed = 1728/27 = 64.
Correct Answer: Rs.876
Explanation:
surface area of a cube= 6 x (8 x 8) = 384 sq.ft
quantity of paint required=(384/16)=24kg
cost of painting= 36.5 x 24 = Rs.876
Correct Answer: a2?2-1
Correct Answer: 180
Correct Answer: (-2,0)
Correct Answer: 1 cm
Correct Answer: 7 cms
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