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- Question
The area of a circle is 616 sq cm, find its circumference?
Options- A. 44 cm
- B. 88 cm
- C. 22 cm
- D. 176 cm
- Correct Answer
- 88 cm
- 1. D and E are points on side AB and AC of ?ABC. DE is parallel to BC. If AD:DB = 2:3 and area of ?ABC is 100 sq cm, what is the area (in sq cm) of quadrilateral BDEC?
Options- A. 84
- B. 16
- C. 25
- D. 75 Discuss
- 2. What is the area (in sq cm) of a rectangle if its diagonal is 26 cm and one of its sides is 10 cm?
Options- A. 120
- B. 240
- C. 360
- D. 480 Discuss
- 3. The hypotenuse of a right-angled triangle 10 cm and its area is 24 cm^2. If the shorts side is halved and the longer side is double, the new hypotenuse becomes
Options- A. ?245 cm
- B. ?255 cm
- C. ?265 cm
- D. ?275 cm Discuss
- 4. The length and breadth of a rectangle is in the ratio of 3 : 1. If its perimeter is 96 m, then what is the length of the rectangle?
Options- A. 36m
- B. 24m
- C. 12m
- D. 48m Discuss
- 5. Find the curved surface area (in cm²) of a hemisphere of diameter 28 cm
Options- A. 1152
- B. 1024
- C. 956
- D. 1232 Discuss
- 6. The area of the largest sphere ( in cm2) that can be drawn inside a square of side 18 cm is
Options- A. 972?
- B. 11664?
- C. 36?
- D. 288? Discuss
- 7. The four sides of a quadrilateral are in the ratio of 2:3:4:5 and its perimeter is 280m. The length of the longest side is
Options- A. 100m
- B. 150m
- C. 175m
- D. 180m Discuss
- 8. In ?ABC, AC = BC and ?ABC = 50°, the side BC is produced to D so that BC = CD then the value of ?BAD is
Options- A. 80°
- B. 40°
- C. 90°
- D. 50° Discuss
- 9. A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. The percentage of decrease in area is:
Options- A. 18%
- B. 28%
- C. 38%
- D. 48% Discuss
- 10. A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq. feet, how many feet of fencing will be required?
Options- A. 22
- B. 44
- C. 66
- D. 88 Discuss
Area problems
Search Results
Correct Answer: 84
Correct Answer: 240
Correct Answer: ?265 cm
Explanation:
Hypotenuse = 10cm
Let the other 2 perpendicular sides be a and b
Area ½ a*b = 24
So a*b = 48 cm^2
Also using Pythagoras
Correct Answer: 36m
Explanation:
Let the length of the rectangle be 3x and breadth be 1x
Given, perimeter = 96 m
2(l + b) = 96 (or) l + b = 48 (or) 3x + 1x = 48 (or) x = 12 m
Now, Length of the rectangle = 12 x 3 = 36 m
Correct Answer: 1232
Correct Answer: 972?
Correct Answer: 100m
Correct Answer: 90°
Correct Answer: 28%
Explanation:
Let original length = x and original breadth = y.
Decrease in area = xy - = (7/25)xy
Decrease % = (7/25)xy * (1/xy) * 100 = 28%
Correct Answer: 88
Explanation:
We have: l = 20 ft and lb = 680 sq. ft.So, b = 34 ft.
Length of fencing = (l + 2b) = (20 + 68) ft = 88 ft.
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