a rectangular strip of steel 2 ft 4 in long 1 ft 6 in wide a

a rectangular strip of steel 2 ft 4 in long, 1 ft 6 in. wide, and 5/8 in thick has four holes drilled through the strip, each with a diameter of 1 1/2 in. if steel weighs .264 lb/cubic inch, what is the weight of this strip.

Solution

Cubic Volume
V=l×w×h = 28 x 18 x 5/8 = 315 in³

steel weighs .264 lb/cubic inch

Hence total weight will be 315 x 0.264 =83.16

The exact weight of the strip will be 83.16 - 4(weight loss due to holes)