Solved Problem 02 | Rectangular Parallelepiped

Problem 2
Compute the cost of lumber necessary to resurface a footbridge 16 ft. wide and 150 ft. long with 2-in. planks, if lumber is \$40 per 1000 board feet. Neglect waste. (One board foot = 1 ft. by 1 ft. by 1 in.)
 

Solution 2