5% more is gained by selling a watch for Rs. 350 than by selling it for Rs. 340. The cost price of the watch is
A. Rs.50
B. Rs.160
C. Rs.200
D. Rs.225
Answer: Option C
Solution (By Examveda Team)
Let Cost price of the Watch = Rs XWhen SP is Rs 340, then gain %={(340−X)/X}×100
When SP is Rs 350, then gain %={(350−X)/X}×100
Hence Additional % gain {(350−X)/X}− {(340−X)/X}×100
Hence {(350−X)/X}×100− {(340−X)/X}×100 = 5
→35000−100− 34000+ 100X) = 5X
or 5X = 1000
or X = Rs 200
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