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nirvana33 [79]
3 years ago
10

you buy two rolls of wrapping paper. each roll has the same lateral surface area. what is the diameter of roll B?

Mathematics
1 answer:
scoundrel [369]3 years ago
8 0
The area of lateral surface is equal that the perimeter multiply by the length. So the lateral surface area of roll A is 3*π*30=90π. Roll B: d*π*24=24dπ. Put them together: 90π=24dπ. So d=3.75 in.
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