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1/3 x p x 3² x 6= 8,2/3 x p x r³
r²=18x3/8x2 = 54/16 =27/8
r=3/2 or 1.5
T.S.A.p² + 2pr²=3pr²
7 x 3 x 22/7 x 1.5²
=148.5cm²
Belan answered the question on February 25, 2019 at 10:07
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