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Q.
The total weight of a tin and the cookies it contains is 2 pounds. After ¾ of the cookies are eaten, the tin and the remaining cookies weigh 0.8 pounds. What is the weight of the empty tin in pounds?
A.
0.2
B.
0.3
C.
0.4
D.
0.5
View Answer
Correct choice: C
Explanation:
Let the weight of the empty tin = w (2 - w) = weight of the cookies; and one quarter of the cookies weigh (2 - w)/4 One quarter of the cookies + tin = 0.8 = w + (2 - w)/4 Multiply through by 4; 3.2 = 4w + 2 - w 1.2 = 3w; w = 0.4
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