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Pooja wants to sell a watch at a profit of 20%. She bought it at 10% less and sold it at $ 30 less, but still she gained 20%. The cost price of watch is
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- $ 240
- $ 220
- $ 250
- $ 225
Correct Option: C
Let Cost Price of watch = Rs. y
| ∴ Selling Price = | = Rs. | 100 | 5 |
Case II,
| Cost Price = Rs. | 10 |
| Selling Price = Rs. |  | - 30 |  | ||
| 5 |
According to the question,
| - 30 | = | × | 5 | 10 | 100 |
| - 30 = | 5 | 25 |
| ⇒ | - | = 30 | 5 | 25 |
⇒ 3y = 30 × 25
| ⇒ y = | = Rs. 250 | 3 |
