Question

Find the radius of a raight circular cylinder whose volume is 3080 cu.Cm and height is 20cm

Answer 1

πr²h  =   3080

(22/ 7) *r² * 20 = 3080

(440/7)*r² = 3080

r² = 3080* 7/ 440

r²=49

r²=7²

so r = 7

hope its help you

Answer 2

πr^2h = 3080

22×r×r=3080×7
r×r=280
r=√280.

so it has no fix answer