Discussion
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- Question
D and E are points on the sides AB and AC respectively of ?ABC such that DE is parallel to BC and AD:DB = 4:5, CD and BE intersect each other at F. Then the ratio of the areas of ?DEF and ?CBF
Options- A. 16:25
- B. 16:81
- C. 81:16
- D. 4:9
- Correct Answer
- 16:81
- 1. PQRA is a rectangle, AP = 22 cm, PQ = 8 cm. ?ABC is a triangle whose vertices lie on the sides of PQRA such that BQ = 2 cm and QC = 16 cm .Then the length of the line joining the mid points of the sides AB and BC is
Options- A. 4?2 cm
- B. 5 cm
- C. 6 cm
- D. 10 cm Discuss
- 2. Two equal circles intersect so that their centres, and the points at which they intersect form a square of side 1 cm. The area (in sq.cm) of the portion that is common to the circles is
Options- A. ?4
- B. ?2-1
- C. ?5
- D. ?2 - 1 Discuss
- 3. A solid sphere of radius 3 cm is melted to form a hollow right circular cylindrical tube of length 4 cm and external radius 5 cm. The thickness of the tube is
Options- A. 1 cm
- B. 9 cm
- C. 0.6 cm
- D. 1.5 cm Discuss
- 4. The length of a side of an equilateral triangle is 8 cm. The area of the region lying between the circum circle and the incircle of the triangle is (use: ? = 22/7)
Options- A. 50 1/7 sq.cm
- B. 50 2/7 sq.cm
- C. 75 1/7 sq.cm
- D. 75 2/7 sq.cm Discuss
- 5. The sum of the length and breadth of a rectangle is 6 cm. A square is constructed such that one of its sides is equal to a diagonal of the rectangle. If the ratio of areas of the square and rectangle is 5 : 2, the area of the square in cm2 is
Options- A. 20
- B. 10
- C. 4?5
- D. 10?2 Discuss
- 6. Diagonals of a Trapezium ABCD with AB || CD intersect each other at the point O. If AB = 2CD, then the ratio of the areas of ?AOB and ?COD is
Options- A. 4:1
- B. 1:16
- C. 1:4
- D. 16:1 Discuss
- 7. If O is the orthocentre of a triangle ABC and ?BOC = 100°, the measure of ?BAC is
Options- A. 100°
- B. 180°
- C. 80°
- D. 200° Discuss
- 8. What is the area (in cm2) of the circumcircle of a triangle whose sides are 6 cm, 8 cm and 10 cm respectively?
Options- A. 275/7
- B. 550/7
- C. 2200/7
- D. 1100/7 Discuss
- 9. Triangle PQR is inscribed in the circle whose radius is 14 cm. If PQ is the diameter of the circle and PR = 10 cm, then what is the area of the triangle PQR?
Options- A. 196
- B. 30?19
- C. 40?17
- D. 35?21 Discuss
- 10. PQR is a right angled triangle in which PQ = QR. If the hypotenuse of the triangle is 20 cm, then what is the area (in cm2) of the triangle PQR?
Options- A. 100?2
- B. 100
- C. 50?2
- D. 50 Discuss
Area problems
Search Results
Correct Answer: 5 cm
Correct Answer: ?2-1
Correct Answer: 1 cm
Correct Answer: 50 2/7 sq.cm
Correct Answer: 20
Correct Answer: 4:1
Correct Answer: 80°
Correct Answer: 550/7
Correct Answer: 30?19
Correct Answer: 100
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