1 Answer

Shivam Bhalla · Answer 1 · 2016-11-01T17:53:10+0000

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
$\boxed{\bf{414}}$

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