Material needed = πD x height
π x 3 x (3 x 12) //multiply by 12 to change the 3 feet to inches
= 339.29 in²
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Answer: 339.29 in²
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We need to subtract 23 by 12
23-12=11
That means there are 11 girls
Your answer is 11:23
Hope this helped
Answer:
Workings and solution to this question can be viewed in the screenshots below: