A) Rs 50
B) Rs 80
C) Rs 90
D) Rs 100
Correct Answer: B
Solution :
| Given, x+5y=450 ... (i) |
| x+10y=S50 ... (ii) |
| Subtract Eq. (i) from Eq. (ii) |
| 5y = 400 |
| y=80 |
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