A man wishes to sell a puppy for $11. A customer wants to buy it but only has foreign currency. The exchange rate for the foreign currency is 11 round coins = $15, 11 square coins = $16, 11 triangular coins = $17.
How many of each coinage should the customer pay?
How many of each coinage should the customer pay? He should pay x round coins, y square coins, and z triangular coins. (Wasn't that easy?) Each round coin is 15/11 of a dollar. Each square coin is 16/11 of a dollar. Each triangular coin is 17/11 of a dollar.
15x/11 + 16y/11 + 17z/11 = 11.
15x + 16y + 17z = 121
x=7 y=1 z=0
He should pay 7 round coins and 1 square coin.
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Posted by Dan
on 2003-11-02 02:25:35 |
No kitten would be that cheap !!
