A watch, after allowing the discount of 15% on its marked price, was sold at a gain of 20%. Had it been sold after allowing a 25% discount there would have been a gain of Rs.120. Find the Cost Price of the watch.
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Answer:1200
Step-by-step explanation:
Consider the cost price to be x.
1st equation
x - (15/100)x = x + (20/100)x ...15% discount and gain of 20%
2nd equation
x - (25/100)x = x + 120 ....25%discount and a gain of 120Rs
Solving above equations by subtracting we get
(10/100)x = (20/100)x - 120
Solving LHS and RHS..
(10/100)x =120
x=1200
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