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Its 60.................

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hmm, if its the area sure, but he is asking for a surface area
i answered surface area in case that it is the case
A cube only has 1 measurement, so i think this is a square pyramid
Formula= 2a + a^2 times the square root of a^2/4 + h^2
(a = base edge, h= height)
=  35 times the square root of 150.25
= 35 times 12.25765067
= 429.0177735, or 429.02 cube cm

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