Question

tex]{\huge{\underline{\underline{\mathfrak{QUESTION}}}}}[/tex]

The volume of a cylinder is 6538 cubic centimetres and its height is 28 cm. find its radius ​

Answer 1

Answer:

Let the radius be r m

According\ to\ given\ conditionsAccording to given conditions

Volume\ of\ cylinder\=6538{cm}^{3}

= > \pi {r}^{2}h=6538=>πr

2

h=6538

= > {r}^{2}=\frac{6538×7}{22×28}=>r

2

=

22×28

6538×7

= > r=\sqrt{72.25}=>r=

72.25

Hence, radius= \boxed{8.5}

8.5

Answer 2

According to problem

volume of cylinder=6358

πr²h=6358

(22/7)×r²×28=6358

r²×28=6358×(7÷22)

r²=72.25

r=8.5 

csa of cylinder=2πrh

=2×(22÷7)×8.5×28

=1496