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Olala · Answer 1 · 2018-01-07T09:38:38+0000

$v = \pi r {}^(2) h \: \\ h = \frac{v}{\pi \: r {}^(2) } \\$
Next answer is -

A = 1/2 h [ b₁ + b₂ ]

A = 1/2 h b₁ + 1/2h b₂

A - 1/2h b₂ = 1/2h b₁

Hence , b₁ = 2/h [ A - 1/2h b₂ ]

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