Answer:a rectangular prism is actually a cuboid,which has six rectangular faces.We have to add the area of six faces to fins it's surface area.Let length be labelled as (L),Width as (W) and Height as (H).Formula for surface area is 2lw+2lh+2hw
Step-by-step explanation:Let x be length =8 units,y be width =16 units and z be height =7 units.
Surface area=2lw+2lh+2hw
(2*8*16)+(2*8*7)+(2*16*7)
(2*128)+(2*56)+(2*112)
256+112+224
=592 square units.
