Re: [計量] 請教兩題計量
※ 引述《Alan655 (用心感覺)》之銘言：
: Q1. A1,Lew, and Karen pooled their funds to buy a gift
: for friend. A1 contributed $2 less than 1/3 of the
: cost of the gift and Lew contributed $2 more than
: 1/4 of the cost. If Karen contributed the remaining
: $15, what was the cost of the gift?
: Ans：36 (可是我一直算22.5...)
: Q2. Four cups of milk are to be poured into a 2-cup
: bottle and a 4-cup bottle. If each bottle is to
: be filled to the same fraction of its capacity,
: how many cups of milk should be poured into the
: 4-cup bottle?
: Ans：8/3
Q1.solution:
suppose the total cost is X
(X/3-2)+(X/4+2)+15=X
the solution of this equation is X=36
Q2.solution:
suppose the fraction of each bottle is X
that is 2X+4X=4 =>X=2/3 so there will be 4*X=8/3 cups of milk should
be poured into the 4-cup bottle.
thank you!
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04/03 20:52, , 1F
04/03 20:52, 1F
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