A metal rod has a diameter of $4.2$ cm. Given that the volume of the rod is $225$ cm${^3}$, de

Question

A metal rod has a diameter of $4.2$ cm. Given that the volume of the rod is $225$ cm${^3}$, determine the length, external surface area of the rod. (Take $\pi =3.142$)

Accepted Answer

(a) $16.2\text{ cm}$ (3 s.f.) (b) $242\text{ cm}^2$ (3 s.f.)

Problem involving Volume and Surface Area of a Cylinder

Problem involving Volume and Surface Area of a Cylinder

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