Question

a solid cylinder has total surface area of 462 CM square its curved surface area is one third of its total surface area find the radius and height of the cylinder​

Answer 1

Answer:

r = 7 cm and h = 3.27 cm

Step-by-step explanation:

(2 x pi x r x h) + (2 x pi x r^2) = 462

(2 x pi x r x h) = 462/3 = 154;

hence ,,,

(2 x pi x r^2) = 462 - 154 = 308;

Therefore:

r^2 = 308 x 7/22 x 1/2

r^2 = 49

r = 7

Similarly find the height