35-37.

Mathematics
Tutor: None Selected Time limit: 1 Day

May 20th, 2015

35. 1296+r^2=(18+r)^2

1296+r^2=324+36r+r^2

36r=972

r=27

36. r=180l/100pi=5.16

37. l=pi*r*120/180= 25.12


May 21st, 2015

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