# Arithmetic for Business with Short Methods and Rapid Calculations in All Fundamental Processes; Designed for Business Colleges, Academies, Public Schools, Etc.

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...surface required for each brick. Dividing this product into 144, will give the number of bricks for each square foot of surface in a wall one brick in thickness. This will be found to be over 1 bricks, which is the number UBually considered for common bricks. If the wall is two bricks thick, 14 bricks will be required, etc. Hence, Rule.--Multiply the number of square feet of surface by 7 when the wall is 1 brick thick; by 14 when the wall is % bricks thick; and by 21 when 8 bricks thick. When greater accuracy is desired, add i of an inch to the length and thickness of a brick, and divide 144 by the product of the increased dimensions for the exact number of bricks to a square foot of wall surface. EXAMPLES. 1. How many common bricks will be required to build the walls of a house 30 ft. long, 28 ft. wide, and 20 ft. high, the wall being 13 in. thick, allowing 200 sq. ft., for doors and windows? Solution: The outside surface = (30 + 28) X 2 X 20 = 2320 sq. ft. The deductions = 200 + (If X 4 X 20) = 286f sq. ft. No. of bricks = (2320--286\$) X 21 = 42700. 2. How many common bricks will be required to build the walls of a house 37 ft. long, 32 ft. wide, and 21 ft. high, the wall being 13 in. thick, deducting 220 sq. ft. for doors and windows? 3. What will the bricks cost for the walls of a house 40 ft. long, 36 ft. wide, and 24 ft. high, the walls being 13 in. thick, of common bricks, at \$7.50 per M., deducting 260 sq. ft. for doors and windows? 4. What will the brick-work of the house in example 3, cost at \$2.25 perM., 130 sq. ft. being allowed for openings? 5. A certain walk is 40 ft. long and 8 ft. wide. What will it %st to pave it with common bricks laid flat, if the bricks cost 18.35 per M., and the workman charges 30/ a square yard? 512. To find...