The Student Room Group

Similarly in 3D Solids

cylinders b and c are mathematically similar.
The volume of b is 1/64 of the volume of c.
The surface area of b is 35.2cm².
Work out the surface area of cylinder c

(but how???)
(edited 4 years ago)
Reply 1
Original post by LylyGocon
cylinders b and c are mathematically similar.
The volume of b is 1/64 of the volume of c.
The surface area of b is 35.2cm².
Work out the surface area of cylinder c


Which bit are you stuck with?
Think about if the "lengths" all double for a similar cylinder. How does the surface area and how does the volume change?
Reply 2
Original post by mqb2766
Which bit are you stuck with?
Think about if the "lengths" all double for a similar cylinder. How does the surface area and how does the volume change?


im stuck in the whole thing :')
Reply 3
Original post by LylyGocon
im stuck in the whole thing :')


So if the "lengths" of a shape all double, how is the new volume related to the original one?

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