Discussion
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- Question
D, E, F are the mid - points of the sides BC , CA and AB respectively of a ?ABC . Then the ratio of the areas of ?DEF and ?ABC is
Options- A. 1/2
- B. 1/4
- C. 1/8
- D. 1/16
- Correct Answer
- 1/4
- 1. PT is a tangent to a circle with centre O and radius 6 cm . If PT is 8 cm then length of OP is
Options- A. 10 cm
- B. 12 cm
- C. 16 cm
- D. 9 cm Discuss
- 2. In ?ABC , DE || AC. Where D and E are two points lying on AB and BC respectively. If AB = 5 cm and AD = 3 cm, then BE : EC is
Options- A. 2:3
- B. 3:2
- C. 5:3
- D. 3:5 Discuss
- 3. Thousand solid metallic spheres of diameter 6 cm are melted and recast into a new solid sphere. The diameter of the new sphere (in cm) is
Options- A. 30
- B. 90
- C. 45
- D. 60 Discuss
- 4. In a circle, a chord, 5?2 cm long, makes a right angle at the centre. Then the length of the radius of the circle will be
Options- A. 2.5 cm
- B. 5 cm
- C. 7.5 cm
- D. 10 cm Discuss
- 5. G is the centroid of ?ABC. If AG = BC, then measure of ?BGC is
Options- A. 45°
- B. 60°
- C. 90°
- D. 120° Discuss
- 6. A circle has its centre at O . A tangent drawn from a point P , which is situated outside the circle, touches the circle at A. If PA = 4 cm & PO=5 cm, then the length of the radius of the circle is
Options- A. 1 cm
- B. 2 cm
- C. 3 cm
- D. 4 cm Discuss
- 7. An inverted conical shaped vessel is filled with water to its brim. The height of the vessel is 8 cm and radius of the open end is 5 cm . When a few solid spherical metallic balls each of radius 1?2 cm are dropped in the vessel , 25% water is overflowed. The number of balls is:
Options- A. 100
- B. 400
- C. 200
- D. 150 Discuss
- 8. Number of circles that can be drawn through three non-colinear points is
Options- A. exactly one
- B. two
- C. three
- D. more than three Discuss
- 9. Two circles touch each other internally. The radius of the smaller circle is 6 cm and the distance between the centre of two circles is 3 cm. The radius of the larger circle is
Options- A. 7.5 cm
- B. 9 cm
- C. 8 cm
- D. 10 cm Discuss
- 10. PQR is an equilateral triangle. MN is drawn parallel to QR such that M is on PQ and N is on PR. If PN = 6 cm, then the length of MN is
Options- A. 3 cm
- B. 6 cm
- C. 12 cm
- D. 4.5 cm Discuss
Volume and Surface Area problems
Search Results
Correct Answer: 10 cm
Correct Answer: 2:3
Correct Answer: 60
Correct Answer: 5 cm
Correct Answer: 90°
Correct Answer: 3 cm
Correct Answer: 100
Correct Answer: exactly one
Correct Answer: 9 cm
Correct Answer: 6 cm
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