Ex. 42.

1. What will 29 acres of land cost at $475 an acre?

2. What will 89 passenger cars cost at $3785 a car? How many acres in a county containing 936 square miles?

3. A square mile contains 640 acres.

4. If a cotton factory makes 9360 yards of cloth daily, how many yards will the factory make in a year (313 days)?

5. The cost of building a certain road was, on the average, $1789 a mile. What was the cost of 327 miles of this road?

6. If a field contains 2340 hills of potatoes, and the average number of potatoes in a hill is 12, how many potatoes are there in the field?

7. If a saw mill turns out 5708 feet of boards in a day, how many feet will it turn out in 294 days?

8. A pound of platinum is worth $85. If 4730 pounds are obtained yearly from South America and the

Ural Mountains, what is the value of the whole amount?

9. Two cities 294 miles apart are to be connected by a railroad, at a cost of $24,645 per mile. What will be the cost of the road?

10. If 125 tons of steel rails are required for one mile of railroad, how many tons will be necessary for 389 miles?

11. A mile contains 5280 feet. How many feet in 542 miles?

12. The garrison of a fort consumes 785 pounds of bread a day. How many pounds will be consumed in 3 years of 365 days?

13. If a railway train runs 38 miles in an hour, how many miles will it run in 84 trips of 3 hours each?

14. A square mile contains 640 acres.

are there in 3481 square miles?

How many acres

15. At the rate of 1275 words in an hour, how many words can be sent over a telegraph line in 108

hours?

16. A clock strikes 156 times a day. How many times does it strike in a leap year (366 days)?

17. If a swallow destroys daily 500 insects, how many will it destroy in 92 days?

18. At 27 bushels an acre, how many bushels of wheat will be harvested from 640 acres?

19. A good cow yields 168 pounds of butter a year. If it takes 215,000 cows to supply London with butter, how many pounds of butter are consumed in that city annually?

20. If sound travels at the rate of 1120 feet in a second, how many feet distant is a cloud where the thunder clap follows the flash of lightning in 9 seconds?

21. Find the weight in pounds of 5792 iron bars, each weighing 24 pounds.

22. From what number can 847 be subtracted 307 times, and leave a remainder of 49?

23. If 19 men can do a piece of work in 31 days, how many days will it take one man to do it?

24. If an army consists of 24 regiments averaging 913 men each, how many men are there in the whole army? 25. If one acre produces 211 pounds of cotton, how many pounds will 933,000 acres produce?

26. If one acre produces 154 pounds of tobacco, how many pounds will 10,070 acres produce?

27. If one acre produces 28 bushels of oats, how many bushels will 911,200 acres produce?

28. If one acre produces 42 bushels of corn, how many bushels will 201,106 acres produce?

29. If one acre produces 17 bushels of wheat, how many bushels will 613,263 acres produce?

30. If one acre produces 227 bushels of potatoes, how many bushels will 19,121 acres produce?

31. If one acre produces 23 bushels of barley, how many bushels will 237,769 acres produce?

32. If one acre produces 19 bushels of winter rye, how many bushels will 27,119 acres produce?

33. British India has a population of 150 to the square mile, and contains 1,004,616 square miles. Find its population.

CHAPTER V.

DIVISION.

62. To divide $42 by 6 is to find the

number of dollars Again, to divide

that must be taken 6 times to make $42. $42 by $6 is to find the number of times that it is necessary to take $6 to make $42. In either case, the product and one factor are given and the other factor is required. Hence,

63. Division is an operation by which when the product and one factor are given the other factor is found.

64. The number to be divided is called the dividend, the number by which the dividend is to be divided is called the divisor, and the result is called the quotient.

65. Division is indicated by the sign of division, or by writing the dividend over the divisor with a line between them. Thus, each of the expressions 42÷6=7, and 42=7, means and is read "forty-two divided by six equals seven.