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What is the height of a cylinder that has the same volume and radius as a sphere of diameter 12 cm ?

A7 cm

B10 cm

C8 cm

D9 cm

Answer:

C. 8 cm

Read Explanation:

Volume of sphere =43π×(63)=\frac{4}{3}\pi{\times{(6^3)}} cu.cm

Volume of Cylinder =πr2h=\pi{r^2}h

=π(6)2×h=\pi{(6)^2}\times{h}

Now,π(6)2×h=43π×63Now, \pi(6)^2\times{h}=\frac{4}{3}\pi\times{6^3}

π=43×6\pi=\frac{4}{3}\times{6}

=8cm=8cm


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A hollow iron pipe is 21 cm long and its exterior diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is [takeπ=227][take \pi=\frac{22}{7}]

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