Hackman Hackman

29-04-2015
Mathematics

Answered

the area of a circle 200mm in diameter is approximately how many times greater than the area of a circle 40mm in diameter?

Answer :

29-04-2015

The area of a circle is pi times radius squared. So the area is proportional to radius squared. 200/40 = 5, and 5 squared = 25.

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