a boy has enough money to buy 20 exercisew book.if each book cost 25 paise less,he could buy 2 more books and still have 20 paise left.how much money did he have??? ans (48 rs)?
? rs = 20 b ... 1.1 ? rs = 22 b
? rs = 22 (b - .25) + .20 = 22 b - 5.3
.1 ? rs = 5.3
? = 53