New complete arithmetic on the inductive method; with parallel mental and written exercises - Tapa blanda

Sinopsis

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. 1885 Excerpt: ...by the width of the carpet, regarding the fraction, if any, as 1. If the carpet is to be laid crosswise, the length of the strips must be equal to the width of the room plus the waste in matching pattern; and the number of strips is found by dividing the length of the room by the width of the carpet, regarding the fraction, if any, as 1. /. How many yards of carpet 2£ ft. wide will cover a floor 20 ft. by 15f ft., if the strips run lengthwise? Solution.--20 ft. = length of strips; lof--2£ = 7, number of strips 7 x 20 ft. = 140 ft.-46£ yd.--Ans. 2. In the same problem, how many yards would be required if the strips ran crosswise? Solution.--15J ft. = length of strips; 20--2£ = 8; hence 9 strips will be required. 9 x 15 ft. = 3 x 15f yd. = 47J yd.--Ans. EXERCISES (Written). 307. 1. A room is 17 ft. long and 15 ft. wide. How much matting a yard wide should be bought to cover the floor (1) if the strips are to be laid lengthwise? (2) If the strips are to be laid crosswise? 2. How many yards of carpet f of a yard wide will be required for a floor 6 yd. long and 15 ft. wide, if the strips run lengthwise and there is a waste of £ of a yard in each strip in matching patterns? 3. A floor 18 ft. by 14 ft. is to be covered with a carpet 30 in. wide. What will the carpet cost at $1.25 per yard, if the strips are laid (1) lengthwise? (2) Crosswise? 4. I wish to purchase a carpet 27 in. wide, for a room 15 ft. by 13J ft. How much more will the carpet cost at $1.60 per yard, if laid crosswise than lengthwise? Solids. 308. A rectangular solid is a solid bounded by six rectangles; as the figure P. The bounding rectangles are called faces, and the lines bounding the faces are called edges. A brick or a box has the shape of a rectangular solid, either...

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