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The difference between the circumference and diameter of a circle is 150 m. The radius of that circle is (Take π = 22/7)
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- 25 metre
- 35 metre
- 30 metre
- 40 metre
- 25 metre
Correct Option: B
Using Rule 14,
Circumference of circle = π × diameter = πd
∴ πd – d = 150
⇒ d (π – 1) = 150
| ⇒ d |  | - 1 |  | = 150 | |
| 7 |
| ⇒ d | | | = 150 | |
| 7 |
| ⇒ d × | = 150 | |
| 7 |
| ⇒ d × | = 70 | |
| 15 |
| ∴ Radius = | = | ||
| 2 | 2 |
= 35 metre
