Discussion
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- Question
The two sides holding the right-angle in a right-angled triangle are 3 cm and 4 cm long. The area of its circumcircle will be in sq.cm:
Options- A. 6.25pi
- B. 6.75pi
- C. 5pi
- D. 7pi
- Correct Answer
- 6.25pi
- 1. The surface areas of three faces of a cuboid sharing a vertex are 20, 32 and 40 sq. mts. What is the volume of the cuboid in cub. m?
Options- A. ?3024
- B. 184
- C. 160
- D. 92 Discuss
- 2. What part of the volume of a cube is the pyramid whose base is the base of then cube and whose vertex is the center of the cube?
Options- A. 4:1
- B. 5:1
- C. 6:1
- D. 7:1 Discuss
- 3. A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is:
Options- A. 12
- B. 60
- C. 72
- D. 90 Discuss
- 4. A cistern 6m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is:
Options- A. 49 sq.m
- B. 50 sq.m
- C. 51 sq.m
- D. 52 sq.m Discuss
- 5. A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:
Options- A. Rs. 456
- B. Rs. 458
- C. Rs. 558
- D. Rs. 568 Discuss
- 6. The diameters of two cylinders are in the ratio 3:2 and their volumes are equal. The ratio of their heights is
Options- A. 2:3
- B. 3:2
- C. 9:4
- D. 4:9 Discuss
- 7. In a quadrilateral PQRS, l_S= 90°. A circle (o, r) touches the sides PQ, QR, RS and SP at A, B, C and D respectively. If QR= 38 cm, RS = 25 cm and QA = 27 cm, find 'r'.
Options- A. 16 cm
- B. 12 cm
- C. 14 cm
- D. 10 cm Discuss
- 8. The least number of square tiles of side 41 cms required to pave the ceiling of a room of size 15m 17cm long and 9m 2 cm broad is:
Options- A. 902
- B. 656
- C. 738
- D. 814 Discuss
- 9. O is the circumcentre of ?ABC. If AO = 8 cm, then the length of BO is
Options- A. 12 cm
- B. 3 cm
- C. 6 cm
- D. 8 cm Discuss
- 10. ABCD is a quadrilateral in which BD and AC are diagonals then
Options- A. AB + BC + CD + AD< AC + BD
- B. AB + BC + CD + DA>AC + BD
- C. AB + BC + CD + DA=AC + BD
- D. AB + BC + CD + DA>2(AC + BD) Discuss
Volume and Surface Area problems
Search Results
Correct Answer: 160
Correct Answer: 6:1
Explanation:
Volume of the cube/volume of pyramid=
Correct Answer: 60
Explanation:
Volume of water displaced = (3 x 2 x 0.01) = 0.06 cu.m.
Mass of man = Volume of water displaced x Density of water
= (0.06 x 1000) kg
= 60 kg.
Correct Answer: 49 sq.m
Correct Answer: Rs. 558
Explanation:
Area to be plastered= [2(l + b) x h] + (l x b)
= [2(25 + 12) x 6] + (25 x 12)
= (444 + 300)
= 744
Cost of plastering = Rs. 744 x (75/100)= Rs. 558
Correct Answer: 4:9
Correct Answer: 14 cm
Correct Answer: 814
Correct Answer: 8 cm
Correct Answer: AB + BC + CD + DA>AC + BD
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