If the width and height of a rectangular prism are each shrunk to one seventh of the original size but the length remains the same, what is the formula to find the modified surface area?

Question

agent0smith · Answer

Draw a rectangular prism with length L, width W, and height H.
Find the expression for its SA.

Draw the shrunk prism with length L, width W/7, and height H/7.
Find the expression for its SA.

lefinnois · Answer

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lefinnois · Answer

Would it be SA= 1/7lw + 1/49lh + 2/7wh

lefinnois · Answer

@agent0smith

agent0smith · Answer

I haven't worked it out; show your work.

lefinnois · Answer

I just thought that with width itd be smaller and the others itd be higher.

agent0smith · Answer

|dw:1466986208433:dw|
Find the surface area of this.