Two similar cylinders have surface areas of 40 π square feet and 90 π square feet. What is the ratio of the height of the large cylinder to the height of the small cylinder?

Question

Two similar cylinders have surface areas of 40 π square feet and 90  π square feet. What is the ratio of the height of the large cylinder to the height of the small cylinder?

anonymous · Answer

what is the equation for surface area of a cylinder?

anonymous · Answer

Volume =   Bh x  area of base x height
Surface Area =   2B x Ch =  (2 x  area of base)  x (circumference  height)

anonymous · Answer

okay, so with that known...with them being 40pi and 90pi, what is the height of each?

anonymous · Answer

we don't know the height unfortunately

anonymous · Answer

just 40pi and 90 pi respectively

anonymous · Answer

its okay, thank you for your help though