A man could buy a certain number of notebooks for Rs. 300. If each notebook cost Rs . 5 more, he could have bought 10 notebooks less for the same amount. Find the price of each notebook?
Q1. A man could buy a certain number of notebooks for Rs. 300. If each notebook cost Rs . 5 more, he could have bought 10 notebooks less for the same amount. Find the price of each notebook?
Answer: Rs. 10
Explanation: Let price = p; notebooks bought = 300/p; at price (p+5) he buys 10 fewer: solving 300/p − 300/(p+5) = 10 gives p² + 5p − 150 = 0, so p = Rs. 10.