A person sold a book at 20 %profit .if he had bought it at 10% less cost and sold for 90more then he would have gained 40% profit find cost price of book.
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Answer:
let CP of book be Rs x
SP = Rs 1.2x
New CP = Rs 0.9x
New SP = Rs 1.2x + 90
ATQ, 0.9x ×
140
100
= 1.2x + 90
1.26x = 1.2x + 90
x = Rs 1500
Step-by-step explanation:
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