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Given the Formula L=π(r1+r2)+2d,L=56.97,d=5.46,r2=6L = \pi \left( r _ { 1 } + r _ { 2 } \right) + 2 d , L = 56.97 , d = 5.46 , r _ { 2 } = 6

Question 39

Multiple Choice

Given the formula: L=π(r1+r2) +2d,L=56.97,d=5.46,r2=6L = \pi \left( r _ { 1 } + r _ { 2 } \right) + 2 d , L = 56.97 , d = 5.46 , r _ { 2 } = 6 Find r1r_ { 1} .


A) r1=L2dπr2=8.76r _ { 1 } = \frac { L - 2 d } { \pi } - r _ { 2 } = 8.76
B) r1=π(L2d) r2=139r _ { 1 } = \pi ( L - 2 d ) - r _ { 2 } = 139
C) r1=L2dπr2=8.65r _ { 1 } = \frac { L - 2 d } { \pi } - r _ { 2 } = 8.65
D) r1=L2dπr2=8.66r _ { 1 } = \frac { L - 2 d } { \pi } - r _ { 2 } = 8.66
E) r1=Lπ+2dr2=23.1r _ { 1 } = \frac { L } { \pi } + 2 d - r _ { 2 } = 23.1

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