SOLUTION: A cylindrical can of radius 7 cm and height 8 cm is open at one end. What is the external surface area of the can correct to 2 decimal places?
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Question 1020409: A cylindrical can of radius 7 cm and height 8 cm is open at one end. What is the external surface area of the can correct to 2 decimal places? Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website! hi there,
Surface area = Pi x radius^2 + (Pi x diameter) x height.
Surface area = Pi x 7^2 + (Pi x 14)x 8
Surface area = 505.80 cm^2
The surface area of the can is found by
using the circumference of the can as
one side of the rectangle that is the
opened can. The other side is the height.
You then use Pi x r^2 for the end of the can.
Hope this helps :-)
