Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση

22. When nine eggs weigh a pound, at what price should they be sold per dozen to be worth 18 cents per pound?

23. What must a carpenter pay for the following bill of lumber? 6500 shingles at $4.75 per M; 15,964 feet of boards at $39.25 per M; 4849 feet of planks at $45.32 per M; 19,496 laths at $0.35 per C.

24. A merchant can ship his coal from Scranton to New York by water for 10 cents per hundred weight, or pay freight on the railroad at the rate of $2.00 per ton. Which will be the cheaper way?

25. A Boston grocer bought 150 pounds of butter in Syracuse at 35 cents per pound. How must he sell it to gain 10 cents per pound, and pay $1.50 a hundred weight for freight and packing?

26. The proprietor of a Minnesota flour-mill had 2 pounds toll from every bushel of wheat ground. Selling the wheat taken for toll in one day at $3.00 per hundred, he received $366. How many bushels were ground in that one day?

27. Two merchants send from St. Louis to Cincinnati 12,660 pounds of wheat each; one by steamboat, paying 12 cents per bushel, the other by railroad, paying 18 cents per hundred. Which conveyance is the cheaper?

28. A Western farmer's corn crop appraised at $1.08 per hundred pounds is worth $831.60. If he sells it at $0.75 per bushel, how much more than the appraised value will he receive? (A bushel weighs 56 pounds.)

Ex. 59.

1. Find the price of 30 Parian statuettes at $8.875 each. 2. In February, 1884, the number of days during which rain fell in New England was 22, and the amount which fell was 4.57 inches. Find the daily average for the 22 days.

3. How many acres are in a park containing 0.08 of 115.1875 acres?

4. If 31.75 rods of fence are made for $10.90, what is the cost of a rod?

5. On a certain day in February, 1884, the thermometer at the highest was 51.1°, and at the lowest 29.4°. Find the difference.

6. Of 100 parts of matter in beans, sugar and gum form 61.10, other vegetable matter forms 31.55, and moisture 5 parts. Of how many parts does the remainder, which is mineral matter, consist?

7. If 0.1571 of the weight of superphosphate is organic matter, find the weight in tons of organic matter in 80 tons of superphosphate.

8. In January, 1884, the barometer at the highest was 30.543 inches, and at the lowest 28.843 inches. Find the difference.

9. A cubic inch of pure water weighs 252.458 grains. Find the weight in grains of a cylindrical inch, which is 0.7854 of a cubic inch.

10. Divide $31.40 among 6 men and 11 youths, giving a youth 0.525 of a man's share.

share?

What is each man's

11. The polar and equatorial diameters of the earth are respectively 41,707,620 and 41,847,426 feet. Ex

press each in miles to three places of decimals, there being 5280 feet in a mile.

12. A zinc bar which at 32° Fahrenheit measures 1 inch, at 212° measures 1.003 inch. Find the length of a bar of the same metal at 212°, which at 32° measures 2.25 inches.

13. The yard measure made by Bird in 1758 was 36.00023 inches long. How many times would this measure

be contained in a mile, there being 63,360 inches in a mile?

14. In 1825 the Stirling jug was measured in Edinburgh, and found to contain 104.2034 cubic inches. Reduce this to the decimal of a liquid gallon (231 cubic inches).

15. The paving of a street has cost $16,473, of which $1173 were paid for the work. If the paving stones were bought at the rate of $9 per hundred, and it takes 36 of them for every square yard of surface, find the surface of the street.

16. A farmer sowed an acre of land with 44 quarts of wheat. The return was 70 sheaves. If 100 sheaves

produce 705 quarts of wheat, what is the product from a quart of wheat sown?

17. A building is lighted by 12 gas-jets, each burning 6 cubic feet per hour. If the gas is burnt five hours a day for 6 months (from October to March inclusive), and 3 hours a day for the rest of the year, what is the annual expense of lighting the building, gas being worth $3 per thousand cubic feet?

18. A man bought 56 dozen eggs at $1.70 a hundred, and sold them at $0.25 a dozen. How much did he gain?

19. The salt water which is obtained from the bottom of a mine of rock salt contains 0.09 of its weight of pure salt. What weight of salt water is it necessary to evaporate in order to obtain 4734 pounds of salt?

20. The weight of ashes from the burning of oak wood is 0.03 of the weight of the wood, and the weight of carbonate of potash contained in the ashes is 0.065 of the weight of the ashes. Find the weight of carbonate of potash which may be obtained from burning 1170 pounds of wood.

21. The weight of sugar from the sugar beet is nearly 0.06 of the weight of the beet. An acre produces 30,000 pounds of beets, which are sold at the rate of $2 a thousand pounds. How many acres of land is it necessary to sow to furnish beets to a sugar factory which produces 150,000 pounds a year, and what will be the value of the crop obtained?

22. If a workman has taken every day for the last 12 years two glasses of beer at 5 cents a glass, how much could he have saved if he had not indulged this habit, reckoning 365 days each year?

23. A woman has three children. She pays for each $15 a year for having their clothes made, $1.50 a month. for mending, and $0.35 a week for washing. How much could she save in a year if she knew how to wash, make clothes, and mend?

24. A farmer sells for $448.40 his crop of

grass at the rate of $15.25 a ton. If his farm produces 2 tons to an acre, how many acres of grass has he?

Ex. 60.

1. Fifteen men and eight boys are employed in a factory. Their weekly pay is $342. If a boy's pay is half a man's pay, what are the daily wages of a man, and also of a boy?

2. A man divides $1622.50 among four persons in such a way that the first has $ 40 more than the second, the second $60 more than the third, and the third $87.50 more than the fourth. Find the part of the fourth.

3. A family composed of six persons makes on the average $8.75 a day, and works 304 days in the year. At the end of the year each member of the family puts $80 in a savings bank. What is the daily expense of the family?

4. A man bought 5.5 yards of cloth for $35. In having a suit made from it, he found that he lacked 1.75 yards, which he procured at the price per yard of his first purchase. What is the cost of the suit if the trimmings cost $6.50 and the making $15?

5. A man bought 76.25 yards of linen at 44 cents a yard. He has the whole made into shirts. It takes 3.05 yards for a shirt, and the price for making is 50 cents for each shirt. What is the cost of a shirt, and how many does he have made?

6. A man's expenses from the first of January to the end of October 17 are $1845.50. How much must he diminish his daily expense in order that the total expense for the year shall not exceed $2200?

« ΠροηγούμενηΣυνέχεια »