45. A field 40 rd. long contains 8 A.

How many

square rods in the field? What is its width?

56. A bin 8 ft. square has a capacity of 256 bu. How deep is it?

57. A tank holding 288 gal. is 33 ft. long and 3 ft. wide. How deep?

58. If a can 21 in. high holds 8 gal., what must be the area covered by the base?

59. A paint manufacturer puts up varnish in quart The cans are 5 in. high and 3.85 in. long. How wide are they?

cans.

60. Find the total cost of the following lumber used for supporting, sheathing, flooring, and roofing an inexpensive summer camp.

28 posts, 6 in. x 6 in., @ $0.25..

2000 sq. ft. pine siding, @ $17 per M.

2375 sq. ft. sheathing, @ $12 per M.

2800 sq. ft. building paper, @ $0.20 per 100 square feet. 900 sq. ft. subflooring, @ $12 per M.

1950 sq. ft. matched flooring, @ $23 per M.

660 lineal feet strips, @ 24 per foot.

1500 cypress sap shingles, for gables, @ $4.25 per M. 6150 cypress heart shingles, for roof, @ $6.50 per M. 61. Mr. Hanson has two fields, each of which requires 144 rd. of fence. One field is 45 rd. long, and the other is a square. Find the number of acres in each.

62. A farmer has a field containing 15g A. He fences off a piece 40 rd. by 20 rd., which he plants to corn. The rest he uses as a pasture. How many acres are planted? What part of the field is used as a pasture?

63. The floor space of a cellar is 32 ft. by 27 ft. How many cubic feet in the walls which are 9 ft. high and 11 ft. thick?

TROY WEIGHT

Troy weight is used in weighing gold, silver, and precious stones.

The coins now minted by the United States government

are:

Gold: Quarter Eagle, $2.50; Half Eagle, $5.00; Eagle, $10.00; Double Eagle, $ 20.00.

Silver: Dime; Quarter Dollar; Half Dollar; Dollar. Nickel 5-cent piece.

Bronze: 1-cent piece.

1. Gold coins are pure gold and pure copper. What per cent of each metal in a gold coin?

The standard unit of value is the gold dollar, which weighs 25.8 Troy grains.

2. Find the number of Troy grains of pure gold in a gold dollar. The number of grains of pure copper.

NOTE. The gold dollar is not now minted.

3. Fill out this table:

pure copper.

How many Troy grains of pure silver in a silver dollar which weighs 412.5 Troy grains?

5. The 5-cent piece is 3 parts copper and 1 part nickel. What per cent of each metal in a nickel?

6. The 1-cent piece is 19 parts copper and 1 part tin and zinc. What per cent of the 1-cent piece is copper? What per cent tin and zinc?

PERCENTAGE

What does the expression per cent mean? The sign %?

TERMS USED IN PERCENTAGE

The whole or the base; the number or quantity of which a certain number of hundredths is to be taken.

The part or the percentage; the part of the whole taken.

The value of the part or the per cent; the number of hundredths of the whole taken.

The part and the value of the part represent the same thing, and are therefore equal.

1. At sight, tell the fractional equivalents of:

Subtract each of the above per cents from 100 %.

2. Write decimally :

150% 125% 1163% 120% 1121% 106%

1. Everett earned $1.50 and spent 20% of it for books. How much had he left?

2. If 40 acres, or 25%, of Mr. Carter's farm is pasture, how many acres in the whole farm?

3. If 10% of a sum of money is $30, what is 1% of it? 100%, or the whole?

4. The boys in the Marshall School won 5 of the 8 games of hockey. What per cent?

5. The boys in the Phillips School won 8 games and lost 4. What per cent did they win?