Question

the total surface area of a cylinder whose radius is three time of its heigt

Answer 1

Answer:

Let height of cylinder be

′

h

′

and radius be

′

r

′

: Then

r=

3

5

h

CSA of cylinder painted =

0.02

92.40

=4620cm

2

⇒2πrh=4620⇒2×

7

22

×

3

5

×h=4620⇒h

2

=

2×22×5

4620×7×3

⇒h

2

=441⇒h=

441

=21cm,r=

3

5

×21=35cm

∴ Volume = πr

2

h=

7

22

×35×35×21=80850cm

3

Step-by-step explanation:

by Debasmita Kar