Question

You plan to construct a brick wall measuring 15 ft. in length, 6 ft. high, and 1 ft. in width. If a brick measures 6 in. x 4 in. x 2 in., how many bricks will you need? (Remember to round up.) Total volume (to the nearest cubic inch) = cubic inches. The number of bricks = .

Answer 1

Total volume 12,960
# of bricks 3,240

Answer 2

Answer with explanation:

Dimension of  wall which consist of Brick

→→→1 feet = 12 inches

Length = 15 feet=15 × 12 =180 inches

Breadth =6 feet=6 × 12= 72 inches

Height = 1 feet=1 × 6 = 6 inches

Volume of Wall= Length × Breadth × Height

                         =180 × 72 × 6 cubic inches

Dimension of  brick

Length = 6 inches

Breadth = 4 inches

Height = 2 inches

Volume of Brick = Length × Breadth × Height

                         = 6 ×4×2 cubic inches

→→→→Number of Brick

                         $=\frac{\text{Volume of Wall}}{\text{Volume of Brick}}\\\\=\frac{180\times 72 \times 6}{6 \times 4 \times 2}=180 \times 9=1620$