A calculator is sold for 345 at a profit of 15%.Find the cost price of the calculator.At what price must it be sold to earn a profit of 25%?
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Step-by-step explanation:
15% profit means if C.P is Rs 100, profit is Rs 15
therefore SP = 100 + 15 = Rs 115
now when SP is Rs 345
CP = 100 / 115× 345= Rs 300
therefore CP = Rs 300
now profit = profit percent /cp×100
= 25/300×100
= Rs 8.3
SP = Cp + profit
= 300+8.3
SP =RS 308.3
therefore cp = rs 300
sp = rs 308.3
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