A box contains 27 cubic feet of sand at 105 pounds per cubic foot; empty box weighs 1200 pounds. What is the correct equation to find the total weight?

• A. 27x105 + 1,200 = 4,035 lbs
• B. 27x105 = 2,835 lbs; 2,835 + 1,200 = 4,035 lbs
• C. (27 x 105) + 1,200 = 3,835 lbs
• D. 27x(105 + 1,200) = 35,235 lbs

Answer: (A)

Total weight comes from adding the weight of the contents to the weight of the box. The sand’s weight is found by volume times density: 27 cubic feet × 105 pounds per cubic foot = 2,835 pounds. Then add the empty box weight of 1,200 pounds to get 4,035 pounds. Expressed as an equation, that is 27 × 105 + 1,200 = 4,035 pounds.

This form is correct because you multiply the volume by its density to get the sand’s weight, then add the box’s own weight. Multiplying the sum (105 + 1,200) would incorrectly mix density with total weight, and other options either split the steps without presenting a single equation or miscompute the final total.