. Complete arithmetic . aking, hov/ much will two such waistscost? 4. If it takes 2| yd. of lawn at 28/ a yard for a shirtwaist, 5^ yd. of trimming at 22/ a yard, 8 buttons at 60/a dozen, and 10/ worth of thread, and if the labor costs$, how much does the waist cost ? 5. How much material is taken up (duplicated) by 32quarter-inch tucks ? If the material is worth $ a yard,how much must be allowed for the extra cost of material ina piece having these tucks ? 6. How wide must a ruffle be cut to be 6 in. deep whencompleted, if there is a hem | in. wide at the bottom, and8 one-eighth-inch
. Complete arithmetic . aking, hov/ much will two such waistscost? 4. If it takes 2| yd. of lawn at 28/ a yard for a shirtwaist, 5^ yd. of trimming at 22/ a yard, 8 buttons at 60/a dozen, and 10/ worth of thread, and if the labor costs$, how much does the waist cost ? 5. How much material is taken up (duplicated) by 32quarter-inch tucks ? If the material is worth $ a yard,how much must be allowed for the extra cost of material ina piece having these tucks ? 6. How wide must a ruffle be cut to be 6 in. deep whencompleted, if there is a hem | in. wide at the bottom, and8 one-eighth-inch tucks are placed, above the hem ? 7. If a lady buys a piece of muslin containing 48 yd.,and uses 19 yd. for sheets, and 18 yd. for pillow cases, howmany skirts can she make from the remainder, allowing3 yd. 24 in. to a skirt? 8. A lady buys a piece of cloth containing 48 yd. at 22/a yard. She uses 33 yd. for various purposes, and the restfor making 4 skirts. What did the cloth cost per skirt ? 236 PRACTICAL MEASUREMENTS. 240. Rectangular Solid. A solid bounded by six rectanglesis called a rectangular solid. The six rectangles are called thefaces of the solid, and their sidesform the edgea of the solid. A rectangular solid has length,breadth, and thickness, and theseare called the three dimensions ofthe solid. 241. Cube. A rectangular solid whose faces are squaresis called a cube (§ 172). 242. Volume of a Rectangular Solid. If this figure rep-resents a rectangular solid 5 in. long, 3 , and 7 in. high, it is evident thatin the column of cubes shown there are7 cu. in. It is also evident that on thebase we can place 3x5 such the volume is 3x5x7 cu. in., or105 cu. in. Hence, if the dimensions areall expressed in the same unit, The number of units of volume in a rectangular solid equalsthe product of the numbers representing the three dimensions.
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