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if the dimensions of a prism are 9 3 and 15 what is the surface area

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The surface area of a prism = 2 x area of base  +  perimeter of base x H

So

Surface area = 

2 x ( 9x3) + (9+3+9+3) x 15

=  2 x 27 + 24 x 15

= 54 + 360

= 414

So the surface area would be [tex]\boxed{\bf{414}}[/tex]

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