Step-by-step explanation:
volume of cylinder = πr²h
but volume = 550cm³
radius = ?
height = ?
ratio of radius and height 5:7
total ratio : 5+7 = 12
If 12 = 550
5 = ?
= 5×550/12
= 2750/12
= 229.167cm
hence the radius of the cylinder is 229.167cm
