Verified Answer :

turkeyberry

1,350   <--- answer

to find the area of the surface of one side, you would do length times width. 
length is 15
width is 15
15 x 15 is 225
since there are 6 sides, you multiply that by 6
225x6 is 1350 which is the answer

Dannymal

L x W = Area it is SQUARE prism
15 x 15 = 225²
225 x 6 = 1350
1350 is the Surface Area :)

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