144 Written. PROBLEMS-REVIEW 1. The sum of two numbers is 384; one of them is 31 greater than the other. Find the numbers. 2. A freight train consisted of 60 cars; the number of closed cars was 6 more than twice the number of open cars. Find the number of each. 3. At a certain election there were two candidates; 1,147 votes were cast, and the candidate chosen had a majority of 259; how many votes did he receive? 4. A library contains 1,000 books; a certain number were drawn out on Monday and twice that number on Tuesday; 880 books were left; how many books were drawn on Monday? 5. A society sent two delegates to a convention. To defray their expenses ($34), the members paid $.75 each into the treasury and thus contributed $8 more than the amount required; how many members were there in the society? 6. The distance from Chicago to Des Moines, Iowa, is 374 miles. If a train runs this in 81 hr., what is its speed per hour? How far would this train run in h hours? How many hours would be required to run 100 miles? To run m miles? 7. Of a company of soldiers, are detached to build breast-works; 15 others are detached for scout duty; of the whole company still remain in the firing line; how many are there in the company? 8. Find a number such that the quotient when it is divided by 3 is 8 more than when it is divided by 6. 9. Two persons have the same annual salary. The first saves of his income. The second, who saves $350 a year more than the first, has $3,000 at the end of 4 years. Find the salary. Oral. XVI INDUSTRIAL APPLICATIONS THE WORLD'S BREAD SUPPLY-WHEAT 1. The large wheat farms of Minnesota and the Dakotas contain from 3,000 to 10,000 acres of land. Using 1 bu. of seed wheat an acre, how many bushels of seed would be used to sow 3,000 acres? 10,000 acres? 2. How many bushels of wheat would a farmer harvest from 3,000 acres yielding 15 bu. an acre? 3. What would this wheat bring at 60¢ a bushel? 4. In a field of 3,000 acres 20 reapers were used, each having the daily capacity indicated in the picture; how many days did it take to cut the grain? 5. The grain was threshed in the field by 10 threshing machines, each having a capacity of 400 bu. a day; how many days did it take to thresh the wheat? 6. The grain was loaded on cars carrying 700 bu. each; how many cars were required for the crop? 7. 4 bu. of wheat are used to make a barrel of flour; how many barrels would this crop make? 3. How many times would the annual wheat yield of Minnesota (about 80,000,000 bu.) fill the elevator shown? 4. Recently, Minnesota's wheat crop (see Exercise 3) was 11 times as large as that of Great Britain, twice that of Australasia, and 6 times that of Egypt. How many bushels were grown by each? 5. The total wheat crop of the United States in a certain year was 670,000,000 bu., of which 40% was consumed at home; how many bushels were exported? 6. Recently, America produced 769,000,000 bu., or about of the world's production; what was the approximate production of wheat in that year? Europe produced of this amount; how many bushels was this? 7. There were in the same year 550,000,000 bread eaters in the world, consuming 4 bu. per capita; how many bushels were consumed? Was the wheat crop sufficient to meet the demand? Oral. COTTON 147 1. The lower Mississippi basin and Atlantic slope is the greatest cotton producing region in the world. Its area is of that of the United States. Taking the latter to be 3,000,000 sq. mi., how many sq. mi. are there in the cotton region? 2. The cotton plantation shown in the picture contains 600 acres; according to the yield given, how many pounds of cotton does it produce in a season? 3. Cotton is pressed into bales of 500 lb. each, if of full weight. How many acres of this plantation are required to grow 1 bale? 4. How many bales are produced by the plantation? 5. The planter sells his cotton for 10¢ a pound; find the value of one season's product from this plantation. Written. 6. 28 million acres of cotton were grown in the United States in 1903. The total crop was 10,758,000 bales. What was the average yield in bales per acre? In pounds. per acre? 7. What was the total value of this product at 124 a pound? 8. Nearly all of the raw cotton grown in the United States is shipped to the northern states or to Europe, for manufacture. 6,482,849 bales were exported to Europe in 1903. According to Exercise 6, how many bales were retained at home? What per cent (within 1%)? 1. How many tons will the cargo of this ship weigh at bales of cotton exported to Europe in 1903? 4. Texas is the largest cotton producing state in the United States. In 1903 the crop was 2,575,000 bales; what percentage was this of 10,758,000 bales, the total production in the United States? 5. The diagram shows how the cotton exported in one year was distributed; what percentage was shipped to Great Britain? To each of the other places? GREAT BRITAIN GERMANY---.. FRANCE__ ALL OTHERS O 10 20 30 40 50 60 70 80 90 100% 6. The world's supply for the same year was produced as follows: America produced 10 million bales, the West Indies 1 million, all others 1 million bales; name the parts of the circle which represent each of these quantities. 7. The average weight was 485.3 lb. a bale; how many tons were there in the world's supply? b 8. Indicate graphically that all of the spindles spinning the cotton were divided thus: Great Britain, 47 million; the European Continent, 34 million; the United States, 22 million; and the East Indies, 5 million. |