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- Question
The length of a rectangle is 12 cm. What is the width if the area is 72 cm ?
Options- A. 6cm
- B. 5cm
- C. 3cm
- D. 4cm
- Correct Answer
- 6cm
ExplanationA=lb
- 1. If the radius of a circle is decreased by 50%, find the percentage decrease in its area.
Options- A. 55%
- B. 65%
- C. 75%
- D. 85% Discuss
- 2. A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:
Options- A. Rs. 456
- B. Rs. 458
- C. Rs. 558
- D. Rs. 568 Discuss
- 3. The area of a circular cricket ground is 24.64 hectares. Find the cost of making rope boundary at the rate of Rs. 5.40 per metre.
Options- A. Rs. 9,600
- B. Rs. 9,504
- C. Rs. 9,802
- D. Rs. 9,876 Discuss
- 4. All sides are congruent in a _____.
Options- A. Rectangle
- B. Parallelogram
- C. Rhombus
- D. Kite Discuss
- 5. Two circles touch each other at point X. A common tangent touch them at two distinct points Y and Z. If another tangent passing through X cut YZ at A and XA= 16 cm, then what is the value (in cm) of YZ?
Options- A. 18
- B. 24
- C. 16
- D. 32 Discuss
- 6. Find the perimeter of the rectangle or square with the given dimensions s = 3 cm
Options- A. 12
- B. 13
- C. 14
- D. 15 Discuss
- 7. Find the perimeter of the rectangle or square with the given dimensions s = 3 cm
Options- A. 12
- B. 13
- C. 14
- D. 15 Discuss
- 8. In a wheelchair slalom event, athletes weave around cones and race to the finish line. A diagram of the rectangular course is shown. Find the perimeter of the course
Options- A. 32
- B. 42
- C. 62
- D. 92 Discuss
- 9. If the ratio of area of rectangle to its perimeter is 60:11. And length and breadth are in the ratio 6 : 5. Find length of rectangle.
Options- A. 40 units
- B. 30 units
- C. 13 units
- D. 24 units Discuss
- 10. The base of a parallelogram is twice its height. If the area of the parallelogram is 338 sq.cm. Find its height?
Options- A. 13 cm
- B. 14 cm
- C. 16 cm
- D. 12 cm Discuss
Area problems
Search Results
Correct Answer: 75%
Explanation:
Let original radius = R.
New radius = =
Original area = and new area =
Decrease in area = = 75%
Correct Answer: Rs. 558
Explanation:
Area to be plastered= [2(l + b) x h] + (l x b)
= [2(25 + 12) x 6] + (25 x 12)
= (444 + 300)
= 744
Cost of plastering = Rs. 744 x (75/100)= Rs. 558
Correct Answer: Rs. 9,504
Correct Answer: Rhombus
Correct Answer: 32
Correct Answer: 12
Explanation:
P=4s
Correct Answer: 12
Explanation:
P=4s
Correct Answer: 92
Explanation:
P = 2l + 2w
Correct Answer: 24 units
Explanation:
Ratio of length and breadth is 6 : 5
? Length = 6x
Breadth = 5x
? Area = l x b = 30x2
? Perimeter = 2 (l + b) = 2(6x + 5x) =22x
? (30*x*x)/(22x)= 60/11
? X = 4
? Length = 6x = 6 x 4 = 24 units
Correct Answer: 13 cm
Explanation:
Let height =x Then, base =2x
2x * x = 338
=>x=13
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