Section: Mathematical Reasoning

62) How many 4-inch by 8-inch bricks are needed to build a walk 6 feet wide and 24 feet long?

1. 54
2. 600
3. 648
4. 840
5. 1,000

Width of walk is 6 ft., or 6 x 12 = 72 in. Width of each brick is 4 in. Number of bricks that can be fitted along the width is 72 / 4 = 18.

Length of walk is 24 ft., or 24 x 12 = 288 in. Length of each brick is 8 in. Number of bricks that can be fitted along the length is 288 ÷ 8 = 36.

18 x 36 = 648