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- Question
Two circles touch each other externally. The distance between their centres is 7 cm. If the radius of one circle is 4 cm, then the radius of the other circle will be
Options- A. 3 cm
- B. 4 cm
- C. 5.5 cm
- D. 3.5 cm
- Correct Answer
- 3 cm
- 1. An arc of 30° in one circle is double an arc in a second circle, the radius of which is three times the radius of the first. Then the angles subtended by the arc of the second circle at its centre is
Options- A. 3°
- B. 4°
- C. 5°
- D. 6° Discuss
- 2. A solid sphere of radius 9 cm is melted to form a sphere of radius 6 cm and a right circular cylinder of same radius. The height of the cylinder so formed is
Options- A. 19 cm
- B. 21 cm
- C. 23 cm
- D. 25 cm Discuss
- 3. Which of the set of three sides can't form a triangle?
Options- A. 5 cm, 6 cm, 7 cm
- B. 5 cm, 8 cm, 15 cm
- C. 8 cm, 15 cm, 18 cm
- D. 6 cm, 7 cm, 11 cm Discuss
- 4. If PA and PB are two tangents to a circle with centre O such that ? APB = 80°. Then ? AOP =
Options- A. 40°
- B. 50°
- C. 60°
- D. 70° Discuss
- 5. In a triangle ABC, if ?A +?C = 140° and ?A + 3?B = 180° , then ?A is equal to
Options- A. 80°
- B. 40°
- C. 60°
- D. 20° Discuss
- 6. Length of the sides of a triangle are a, b, c respectively. If a2 + b2 + c2 = ab +bc + ca then the triangle is
Options- A. isosceles
- B. equilateral
- C. scalene
- D. right-angled Discuss
- 7. Length of the sides of a triangle are a, b, c respectively. If a2 + b2 + c2 = ab +bc + ca then the triangle is
Options- A. isosceles
- B. equilateral
- C. scalene
- D. right-angled Discuss
- 8. A right circular conical structure stands on a circular base of 21m diameter and is 14m in height. The total cost of colour washing for its curved surface at Rs. 6 per sq. m. is (Take ? = 22/7 )
Options- A. 4365
- B. 4465
- C. 3465
- D. 3365 Discuss
- 9. Points P , Q and R are on a circle such that ?PQR = 40° and ?QRP = 60° . Then the subtended angle by arc QR at the centre is
Options- A. 80°
- B. 120°
- C. 140°
- D. 160° Discuss
- 10. In an isosceles triangle ?ABC, AB = AC and ?A = 80°. The bisector of ?B and ?C meet at D. The ?BDC is equal to
Options- A. 90°
- B. 100°
- C. 130°
- D. 80° Discuss
Volume and Surface Area problems
Search Results
Correct Answer: 5°
Correct Answer: 19 cm
Correct Answer: 5 cm, 8 cm, 15 cm
Correct Answer: 50°
Correct Answer: 60°
Correct Answer: equilateral
Correct Answer: equilateral
Correct Answer: 3465
Correct Answer: 160°
Correct Answer: 130°
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