Question

Find the area of base & radius of cylinder if its curved surface area is "660sq" cm and height is 21cm

Answer 1

Answer:

CSA = 660 sq. cm

Height = 21cm

$CSA \: = 2\pi \: rh$

=> 660 = 2*22/7*r*21

=> 660 = 132*r

=> r = 5cm

$Area Of Base \: = 2\pi {r}^{2}$

=> Area of base = 2*22/7*5

=> Ar. of base = 31.428 sq. cm