Wilson purchased a certain number of wallets at $6 each. If he had purchased those at $8 each, he would have purchased 20 fewer wallets. How much money did he have? [Ans : $480]
6 : 8 = 3 : 4 Ratio of the number is inversely proportional to the price
1 u --> 20
4 u --> 4 x 20 = 80 Note: 4 u at $6 (3 u at $8) [inverse proportion]
6 x 80 = $480
He had $480.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment