SOLUTION: Discs of radius 4 cm are cut from a rectangular plastic sheet of length 84cm and width 24cm.How many complete discs can be cut out?

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Question 741225: Discs of radius 4 cm are cut from a rectangular plastic sheet of length 84cm and width 24cm.How many complete discs can be cut out?

Found 2 solutions by mananth, Alan3354:
Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website!

Area of sheet = 84*24=2016 cm^2
Area of disc = pi * r^2= pi*4^2= 50.26

2016/50.26= 40 numbers

Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website!
Discs of radius 4 cm are cut from a rectangular plastic sheet of length 84cm and width 24cm.How many complete discs can be cut out?
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There's some wasted material due to the shapes.
Each disc can consume a square of material 8 by 8 cm = 64 sq cm
84/8 = 10.5 --> 10 rows
Overall, you get 3 by 10 = 30 discs
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More might be possible by offsetting rows, I'll check again later today.