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TSA =231cm²
2πr(r+h) =231 ............(1)
CSA =⅔×TSA2πrh =⅔×231=154
h=154/2πr ............(2)
From (1)
2πr(r+154/2πr) =231
2πr²+154 =231
2πr²=77
r² = 77/2π
r² =77/2×22/7
r² =49/4
r =7/2
From (2)
h = 154/2πr
=154/2×22/7×7/2
=7cm
Volume =πr²h
=22/7×49/4×7
=539/2
=269.5cm²
2πr(r+h) =231 ............(1)
CSA =⅔×TSA2πrh =⅔×231=154
h=154/2πr ............(2)
From (1)
2πr(r+154/2πr) =231
2πr²+154 =231
2πr²=77
r² = 77/2π
r² =77/2×22/7
r² =49/4
r =7/2
From (2)
h = 154/2πr
=154/2×22/7×7/2
=7cm
Volume =πr²h
=22/7×49/4×7
=539/2
=269.5cm²
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