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- Question
A solid cone of height 24 cm and radius of its base 8 cm is melted to form a solid cylinder of radius 6 cm and height 6 cm. In the whole process what percent of material is wasted?
Options- A. 48.5
- B. 37.5
- C. 57.8
- D. 64
- Correct Answer
- 57.8
- 1. Smaller diagonal of a rhombus is equal to length of its sides. If length of each side is 6 cm, then what is the area (in sq.cm) of an equilateral triangle whose side is equal to the bigger diagonal of the rhombus?
Options- A. 18?3
- B. 27?3
- C. 32?3
- D. 36?3 Discuss
- 2. PQRS is a cyclic quadrilateral and PQ is the diameter of the circle. If ?RPQ = 38°, then what is the value (in degrees) of ?PSR?
Options- A. 52
- B. 77
- C. 128
- D. 142 Discuss
- 3. The length of two parallel sides of a trapezium are 18 m and 24 m. If its height is 12 m, then what is the area (in sq.m) of the trapezium?
Options- A. 126
- B. 252
- C. 504
- D. 1024 Discuss
- 4. If PA and PB are tangents to the circle with centre O such that ?APB=50° , then the ?OAB=
Options- A. 25°
- B. 30°
- C. 40°
- D. 50° Discuss
- 5. If an interior of a regular polygon is 170o, then the number of sides of the polygon is
Options- A. 30
- B. 20
- C. 18
- D. 27 Discuss
- 6. In triangle ABC, ?ABC = 90°. BP is drawn perpendicular to AC. If ?BAP = 50°, then what is the value (in degrees) of ?PBC?
Options- A. 30
- B. 45
- C. 50
- D. 60 Discuss
- 7. In triangle PQR, the sides PQ and PR are produced to A and B respectively. The bisectors of ?AQR and ?BRQ intersect at point O. If ?QOR = 50°, then what is the value (in degrees) of ?QPR?
Options- A. 50
- B. 60
- C. 80
- D. 100 Discuss
- 8. If the diameter of a hemisphere is 21 cm, then what is the volume (in cub.cm) of hemisphere?
Options- A. 2810
- B. 1250.5
- C. 1725.25
- D. 2425.5 Discuss
- 9. In ?ABC, AD is the median and AD = (1/2)BC. If ?ACD = 40°, then what is the value (in degrees) of ?DAB?
Options- A. 30
- B. 40
- C. 50
- D. 60 Discuss
- 10. Circum center of ?ABC is O. If ?BAC = 75 and ?BCA = 80 degrees, then what is the value of ?OAC(in deg)?
Options- A. 45
- B. 65
- C. 90
- D. 95 Discuss
Volume and Surface Area problems
Search Results
Correct Answer: 27?3
Correct Answer: 128
Correct Answer: 252
Correct Answer: 25°
Correct Answer: 30
Correct Answer: 50
Correct Answer: 80
Correct Answer: 2425.5
Correct Answer: 50
Correct Answer: 65
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