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= πr²t + 2πrt
= 2πr(r + t)
= 2 x r²/2 x r(r + (5 + r)²)
= r³(r + r² + 10r + 25)
= r³(r² + 11r + 25)
= r⁵ + 11r⁴ + 25r³
= πr²t + 2πrt
= 2πr(r + t)
= 2 x r²/2 x r(r + (5 + r)²)
= r³(r + r² + 10r + 25)
= r³(r² + 11r + 25)
= r⁵ + 11r⁴ + 25r³
menurut saya itu