A field is in the form of a circle. The cost of fencing around it at 12 per meter is 2,640. What is the area (in m2) of the field?
(Take 
)
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 3850 m2
| Understanding | Application |
| Tricks |
Given 12 per meter is 2640 So in one meter = 2640/12 = 220 |
| Now |
2πr = 220 r = 220 × 7/22 ×2 r = 35 |
| Hence |
Area = πr2 = 22/7 × 35 × 35 = 3850 |