a) 365
b) 370
c) 375
d) 390
Answer: c
Explanation: He sold his watch at loss of 5%. If he sells his watch for Rs. 56.25 more, he would gain 10%.
15% = Rs. 56.25.
1% = $$\frac{{56.25}}{{15}}$$
100% = $$\frac{{56.25 \times 100}}{{15}}$$ = Rs. 375
The cost price of the watch is Rs. 375
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