Question

a cylinder tanks has the capacity 3080 cubic cm. find its curved surface area if its depth is 20cm​

Answer 1

I think it is correct .....
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Answer 2

$<b><i><u>Hey mate ❤$

Here's ur answer -

Here, depth = height = 20cm

Volume = 3080 cm³

We know that

$Volume of cylinder= πr²h$

Then r =

$3080 = 22 \div 7 \times r {}^{2} \times 20 \\ 3080 = 440 \div 7 \times r {}^{2} \\ r {}^{2} = 3080 \times 7 \div 440 \\ r {}^{2} = 49 \\ r = 7cm$

Now, CSA

$CSA of cylinder = 2πrh$

$c.s.a \: = \: 2 \times 22 \div 7 \times 7 \times 20 \\ c.s.a \: = \: 880cm {}^{2}$

Hope it helps ✔