Discussion
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- Question
Area of circle is equal to the area of a rectangle having perimeter of 50 cms. and length more than the breadth by 3 cms. What is the diameter of the circle?
Options- A. 7 cms
- B. 21 cms
- C. 28 cms
- D. 14 cms
- Correct Answer
- 14 cms
ExplanationLet the breadth of rectangle be x cm => Length of rectangle = (x+3) cm Now, perimeter =2(x+x+3) = 50 => 2x + 3 = 25 => x = 11 Thus, breadth = 11 cm and length = 14 cm Area of circle = Area of rectangle =>pi * r* r = 14 * 11 =>r*r = 14 * 11 * 7/22 =>r = 7 cm Diameter = 2 * 7 = 14 cm
- 1. Find the total surface area (in cm2) of a cube of side 7.5 cm.
Options- A. 364.5
- B. 446
- C. 337.5
- D. 684 Discuss
- 2. The area of a circle is 346.5 cm2. Find its circumference (in cm).
Options- A. 132
- B. 38
- C. 66
- D. 76 Discuss
- 3. In a trapezium ABCD, AB || CD, AB < CD, CD = 6 cm and distance between the parallel sides is 4 cm. If the area of ABCD is 16 sq.cm, then AB is
Options- A. 1 cm
- B. 3 cm
- C. 2 cm
- D. 8 cm Discuss
- 4. A wheelchair slalom event, athletes weave around cones and race to the finish line. A diagram of the rectangular course 30m length &16m bredth is shown. Find the the area of the course
Options- A. 480
- B. 560
- C. 180
- D. 460 Discuss
- 5. Find the area of the rectangle or square with the given dimensions L = 5 inches, W= 3 inches?
Options- A. 13
- B. 14
- C. 15
- D. 16 Discuss
- 6. The length of the diagonal of a square is 14 cm. What is area of this square?
Options- A. 49 sq cm
- B. 196 sq cm
- C. 98 sq cm
- D. 77 sq cm Discuss
- 7. The circumferences of two circles are touching externally. The distance between their centres is 12 cm. The radius of one circle is 7 cm. Find the diameter(in cm) of the other circle.
Options- A. 12
- B. 10
- C. 8
- D. 5 Discuss
- 8. The area and the length of one of the diagonals of a rhombus is 84 cm² and 7 cm respectively. Find the length of its other diagonal (in cm).
Options- A. 12
- B. 24
- C. 48
- D. 36 Discuss
- 9. Find the perimeter (in cm) of a semicircle of radius 28 cm.
Options- A. 288
- B. 144
- C. 121
- D. 242 Discuss
- 10. ABCD is a quadrilateral inscribed in a circle (radius = ). The bisectors of the angles DAB and BCD intersect the circle at X and Y, respectively. What is the length of the straight line XY?
Options- A. π (rxr)
- B. 2r
- C. (r + 2)
- D. π (rxr)/2 Discuss
Area problems
Search Results
Correct Answer: 337.5
Correct Answer: 66
Correct Answer: 2 cm
Correct Answer: 480
Explanation:
A = lw
Correct Answer: 15
Explanation:
We know that,
Area of rectangle A = L x W = 5 x 3 = 15 sq.inches.
Correct Answer: 98 sq cm
Correct Answer: 10
Correct Answer: 24
Correct Answer: 144
Correct Answer: 2r
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