2*3.14*r(r+15)=313

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Solution for 2*3.14*r(r+15)=313 equation: 



2*3.14r(r+15)=313

We move all terms to the left:

2*3.14r(r+15)-(313)=0

Wy multiply elements

6r-313=0

We move all terms containing r to the left, all other terms to the right

6r=313

r=313/6

r=52+1/6

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