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mayafuentes3 mayafuentes3
  • 08-06-2015
  • Mathematics
Answered

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

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

Verified Answer :

lulu1991
lulu1991 lulu1991
  • 18-06-2015

The area of lateral surface is equal that the perimeter multiply by the length. So the lateral surface area of roll A is 3π30=90π. Roll B: dπ24=24dπ. Put them together: 90π=24dπ. So d=3.75 in.

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