Surface area what the surface area of a rectangle 8in 10 3/4ths and 5 1/2

The surface area of the cuboid is 378 square inches.

Step-by-step explanation:

A cuboid is a shape which has six surfaces formed from a rectangle. The surface area of a cuboid is the sum of all its individual ares of each surface.

Given the following dimensions of the cuboid:

length = 10 3/4 in = in

width = 8 in

height = 5 1/2 in = in

Since the opposite surface of a cuboid are the same, then;

Area of the 1st surface = length x width

                                      = x 8

                                      = 86 square inches

Area of the 2nd surface = width x height

                                        = 8 x

                                        = 44 square inches

Area of the 3rd surface = length x height

                                       =   x

                                       =

                                       = 59 square inches

Surface area of the cuboid = 2 x 86 + 2 x 44 + 2 x

                                             = 172 + 88 + 118.25

                                             = 378.25

Surface area of the cuboid = 378 square inches

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation: