Question

The volume of a cylindrical vessel is 154 litres and its height is 40 cm. Find :
i) the radius of the vessel.
ii) the lateral surface area of the vessel.

*please write the answer with steps
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Answer 1

Step-by-step explanation:

Let's calculate radius :

$\implies$ $Volume=πr^{2}h$

$\implies$ $154000={\Large\frac{22}{7}}×40×r^{2}$

$\implies$ ${\Large\frac{154000×7}{22×40}}=r^{2}$

$\implies$ $r^{2}=1225$

$\implies$ $r=\sqrt{1225}$

$\implies$ $\boxed{r=35cm}$

Let's calculate LSA of cylinder :

$\implies$ $LSA=2πrh$

$\implies$ $LSA=2×{\Large\frac{22}{7}}×35×40$

$\implies$ $\boxed{LSA=8,800cm^{2}}$

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Answer 2

Answer:

r=3

Step-by-step explanation: