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`        An employee has been given the responsibility to buy some books for prize distribution . In shop A, by reducing the price of book by Rs.10, the employee can buy 4 more books for Rs.800. what is the cost of one book.`
one year ago

Arun
22553 Points
```							Dear student let the price of one book = xand the no of book that can be purchased with x rs per book = y nowx* y = 800 (x –10)(y + 4) = 800 nowxy +4x –10y –40 = 800put xy = 800 800 + 4x – 10y –40 = 8004x – 10y = 40 put y = 800/x then a quadratic equation will be formed in x solve that equation and you will get the cost of one book.  RegardsArun (askIITians forum expert)
```
one year ago
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