Question

the ratio of the curved surface area and the total surface area of a circular cylinder is 5:7 find the ratio between the height and radius of cylinder

Answer 1

CSA of cylinder=
$2\pi \: rh$
TSA of cylinder=
$2\pi \: r(h + r)$
$csa \div tsa = 5 \div 7$
cancel terms like there in photos

that is your frnd