FINDING AREAS

243

1. A porch measures 9 ft. by 27 ft. How many sq. ft. does it contain? How many sq. yd.?

In stating measurements we usually say "9 feet by 27 feet" instead of "9 feet wide and 27 feet long." The sign X is often used for "by." Thus: 9 ft.X27 ft. Observe that in stating measurements, the width is given first.

2. A room is 12 ft. by 15 ft. How many sq. ft. does it contain? A carpet that covers the room costs $40. How much did each sq. yd. of carpet cost?

3. A schoolroom contains 644 sq. ft. The room is 24 ft. long. How wide is it?

4. A walk measures 6 ft. by 60 ft. Find the number of sq. ft. and sq. yd. in it. The walk cost $90. What was the cost by the sq. ft.?

5. A cellar floor measures 24 ft. by 33 ft. How many sq. ft. does it contain? How many sq. yd.?

6. How much will it cost to build a walk 6 ft. by 30 ft. at 22¢ a sq. ft.?

7. How much will it cost to paint the floor of a porch 12 ft. by 30 ft. at 27¢ a sq. yd.?

8. A lawn measures 36 ft. by 54 ft. How much will it cost to grade and seed it at 25¢ a sq. yd.?

9. It cost 28¢ a sq. ft. to pave a driveway 8 ft. by 81 ft. What was the total cost?

10. How many sq. ft. of sheet metal will it take to cover one side of a signboard 12 ft. by 27 ft.?

11. What will be the cost of the metal work on the above signboard at $2.85 a sq. yd.?

12. A lot is 150 ft. by 165 ft. How many sq. yd. does it contain?

244

CENSUS REPORTS

The populations of the largest ten cities of the United States for the years 1910 and 1920 were as follows:

1. Find the gain in population of each of the above cities, except Buffalo and Los Angeles, and write the names of the cities in the order of their gain in population.

2. Find the gain in population in your county from 1910 to 1920.

3. What was the difference in the population of New York City and Chicago in 1910? In 1920?

4. What was the difference in the population of St. Louis and Detroit in 1920? Of Los Angeles and Pittsburgh? Of Philadelphia and Boston?

5. What was the total gain in population in the above cities from 1910 to 1920?

6. Find the gain in population in each of the largest two cities in the list above from 1910 to 1920. Find the total gain in population in these cities.

7. Which was the greater in 1920, the population of New York City, or the combined populations of Detroit, Cleveland, St. Louis, Boston, Baltimore, Pittsburgh, and Los Angeles?

REVIEW PROBLEMS

245

1. A man buys a piano for $750, paying $325 down. At $25 a month, how long will it take to pay the remainder?

2. Henry buys four baseballs for $3.25. He pays $1.50 for one and $.50 each for two. How much does he pay for the fourth baseball?

3. Arthur's grades for the month are as follows: Arithmetic 85, Reading 85, Spelling 90, Language 85, Geography 85, Writing 80. Divide the sum of his grades by the number of subjects he studied to find his average grade.

4. A lot that is a rectangle is 45 feet wide and 135 feet long. How many feet of fence will it take to enclose it? What will the fence cost at $.65 a foot?

5. James and John start from the same place. James skates 425 feet east; John skates 235 feet west. How far apart are they then?

6. The school yard is 50 yards wide and 75 yards long. How many yards of fence will be required to enclose it?

7. Carl sold 327 papers. Harry sold 96 less than Carl. How many papers did both boys sell?

8. Tom spends $67.50 a month, and saves $21.75. At that rate what does he save in 2 years?

9. George earned $32.24 in a week. He gave of the money to his mother, and of it to his sister. How much did he then have?

She divided of

10. Kate's mother baked 45 cookies. them equally among Kate's five playmates. How many cookies did each receive?

11. Helen's suit cost $36, her hat cost her shoes costas much as the suit. the hat, for the coat, and for all?

as much as her suit, What did she pay for

How many months are in the year? Name them.
Why do we often use Jan. instead of January?

Write the names of the months that are abbreviated below.

Jan. Feb. Mar. Apr. Aug. Sept. Oct. Nov. Dec. Write the names of the months from memory.

What months have 31 days? 30 days? Less than 30 days?

Memorize:

Thirty days hath September,
April, June, and November;
All the rest have thirty-one,

Excepting February alone,
Which has twenty-eight in line,

Till leap year gives it twenty-nine.

A leap year is any year that can be evenly divided by 4, except the century years, which must be evenly divided by 400.

NOTE TO TEACHER: In many schools the pupils keep calendars, and place on them a record of each day's weather conditions and temperature.

1. How many hours are in 1 day? How many minutes? How many seconds?

2. How many days are in 1 week? How many hours? How many minutes?

3. There are 30 days in 1 month. How many hours are in 1 month?

4. How many months are in 1 year? How many days? How many days are in 7 years?

5. How many hours are in the month of January?

6. How many hours are in the month of February, in a common year? In a leap year?

7. How many more hours in December than in February, in a common year? In a leap year?

8. How many more hours in November than in February, in a common year? In a leap year?

9. How many days are in the months of January, February, and March, 1924? How many hours?

10. January is the first month of the year. What is the sixth month?

11. How many months in a year?