A bricklayer is building a brick rectangular post to anchor a mailbox. The post is 3.25 feet tall, 2.5 feet deep, and 2.5 feet wide. Each brick is 3.5 inches by 6 inches by 3.5 inches. About how many bricks does he need?
+130516 Let's assume that the mortar is negligible {probably not a good assumption}.... and the post is "solid"
Each brick is 3.5 inches by 6 inches by 3.5 inches = (7/24)ft x (1/2) ft x (7/24)ft = 49/1152 cu ft
And the post is 3.25 ft x 2.5 ft x 2.5 ft = (13/4) ft x (5/2) ft x (5/2) ft = 325 /16 cu ft
So.......to find the number of bricks needed, we have ( 325/16 ) / (49 / 1152) = about 478 bricks
+23254 Is this a solid post or a hollow post?
How much mortar are you using between bricks.
The size of the bricks won't allow for a solid post without mortar for the size of the post.
+130516 Let's assume that the mortar is negligible {probably not a good assumption}.... and the post is "solid"
Each brick is 3.5 inches by 6 inches by 3.5 inches = (7/24)ft x (1/2) ft x (7/24)ft = 49/1152 cu ft
And the post is 3.25 ft x 2.5 ft x 2.5 ft = (13/4) ft x (5/2) ft x (5/2) ft = 325 /16 cu ft
So.......to find the number of bricks needed, we have ( 325/16 ) / (49 / 1152) = about 478 bricks
