Q. 104.0( 41 Votes )

# The radius and he

Answer :

It is given in the question that,

The ratio of radius and height is 7 : 2

This means that,

r =

Now,

We can find the volume of the cylinder as:

Volume of the cylinder =

8316 =

8316 =

h^{3} = 216

h = 6

Hence,

Radius, r =

=

= 21 cm

Therefore,

Total surface area of the cylinder =

=

= 2× 22× 3× 27

= 3564 cm^{2}

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