Question

9. A cylinder has radius 4.2 cm and height 30 cm. Find the surface area of the cylinder, if it is
(1) Open at both ends
(ii) Closed at one end
(iii) Closed at both ends.
Note for the
Teacher​

Answer 1

Step-by-step explanation:

A=2πrh+2πr2=2·π·4.2·30+2·π·4.22≈902.51674cm²

3 option is correct