Hat and scarf

Katy knitted a scarf four times faster than a hat. Knitting together lasted 15 days. How much did she knit a hat?

Correct answer:

c =  12 d

Step-by-step explanation:

s:c=1:4=0.25  x=15/(4+1)=3  s=1 x=1 3=3 d c=4 x=4 3 d=12 d



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