Question

A flower box in the shape of a right rectangular prism is made of thin metal, shown below. The box has length 90 centimeters (cm), width 45 cm, and height 45 cm. The box is 85 percent filled with soil. Each bag of soil holds 1 cubic (ft^3), and 1 ft^3 is approximately 28,316 cubic centimeters (cm^3). How many bags of soil are needed to finish filling the flower box?
A. 1 bag

B. 2 bags

C. 6 bags

D. 7 bags

Answer 1

1) Volume of the box = 90*45*45=182250 cm³
2) filled with soil = 0.85*182250= 154912.5 cm³
3) 182250 cm³-154912.5 cm³=27337.5 cm³ not filled 
4) 27337.5 cm³/28316 cm³=0.9654 ≈ 1 bag