一題數學請教
Jane knits 72 stitches to the line and uses 1/4 inch of yarn in each of the stitches.
How many lines can she knit with 10 yards of yarn?
(1 yard=3 feet; 1 foot= 12 inches)
a) 10
b) 20
c) 30
d) 40
e) 50
answer:b
請問題目是什麼阿....看不懂???
謝謝大家
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