Question

The volume of a 5cm long cylindrical iron rod is 30cm cube. Find its diameter.

Answer 1

$\pi {r}^{2}h = 30 \\ \\ {r}^{2} = \frac{30 \times 7}{22 \times 5} = \frac{210}{110} = 1.909 \\ r = \sqrt{1.909}\:\: \:\:\&\:\: \:\:d=2\sqrt{1.909}$

Answer 2

Answer :

The solution is in the attachment

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