Question

Find the cost of lining a topless rectangular tank 4.8 inches long, 12.2 inches wide, and 9 inches deep with zinc, weighing 4.8 pound per square foot, at $2.83 per pound installed

Answer 1

Typo in length ?? (much less than width)

Answer 2

area of base = (4.8)(12.2) inches^2
area of 4 sides = 2(4.8)(9) + 2(12.2)(9) inches^2

add them up, multiply by 4.8 to get the weight in pounds,
then multiply by 2.83 to get the total cost in dollars.