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A lawn is in the form of a rectangle having its breadth and length in the ratio 3 : 4. The area of the lawn is 1/12 hectare. The breadth of the lawn is
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- 25 metres
- 50 metres
- 75 metres
- 100 metres
- 25 metres
Correct Option: A
Using Rule 9,
| = | hectare = | × 10000 | sq.metre | ||
| 12 | 12 |
| = | sq metre | |
| 3 |
| ∴ 3x × 4x = | sq metre | |
| 3 |
| ⇒ x² = | ⇒ x = | ||
| 3 × 3 × 4 | 6 |
| ⇒ Width = 3x = 3 × | |
| 6 |
= 25 metre
