Question

the ratio of radius and height of cylinder is 2:3.If its volume is 12936cm3 find the total surface area of the cylinder​

Answer 1

Answer:

let the radius and height of cylinder be x

so,radius=2x

height=3x

total surface area of the cylinder=2πr(r+h)

12936=2×22/7×2x(2x+3x)

12936=2×22/7×2x×5x

=12936×7/22×2×2x×5x

x=147×7/5

x=1029/5

x=205.8cm