Question

the height of a right circular cylinder is 10cm and the diameter of the base is 18 cm find the Surface area

Answer 1

height (h) = 10 cm
radius (r) = 18/2 = 9 cm
Curved Surface area = 2*pi*r*h
= 2 x 3.14 x 9 x 10
= 565.2 sq cm.
Total Surface Area = 2*pi*r*h + 2*pi*r*r
= 565.2 + 508.7
= 1073.9 sq cm

Answer 2

Thanks :D

Answer 3

Cylinder Surface Area = 2 x (3.1416 x Radius2) +
(2 x 3.1416 x Radius x Length)
where diameter is twice of radius you can do it now :D