Make and solve problems using the following data: 1. The street-paving cost $1.50 per sq. yd.

2. The construction of the canal cost $.50 per sq. yd. 3. The equipment for lighting the streets cost $2,000 per mile.

4. The construction of sewers on every street cost at the rate of $1.00 per running foot.

5. It cost $3.50 per foot to construct the street-car line. 6. Land in blocks that border on the canal is worth 25¢ per sq. ft.; the rest is worth 50¢ per sq. ft.

226

REVIEW AND SUMMARY

1. What does the symbol represent? What is its approximate value?

2. Find the circumference of a belt-wheel whose diameter is 7 ft. 3 in.

3. What kind of lines are shown in the picture?

4. How many

right angles are there in the sum of the angles of a quadrilateral?

5. Of a 15,000 edition of a magazine, the number

taken by the news-stands was of that mailed to subscribers; how many were there in each of these two lots?

6. When the wind is blowing 45 miles an hour, how long will it take a storm to cross New York State, 325 miles?

7. When the pressure of the wind is 10.12 lb. per square foot, what is the total pressure on a chimney whose surface is 10 ft. by 2 ft. 4 in.?

8. What is meant by graphical representation? Name two ways of representing numbers graphically.

9. In 1900, about 300,000 persons were employed in the manufacture of cotton goods in the United States. Of these, 162,000 were in the New England States. What percentage of the total number was employed in the New England States? Shade a portion of a 10-inch square to represent this percentage.

10. In 1900 the population of the United States was 76 million; of this 87% were native born. Represent the population in 1900 by a 10-in. square and shade a portion of it to represent the native-born population.

I. 20% of potatoes is water; how many pounds of water are there in 100 lb. of potatoes? In 500 lb.? In 250 lb.? In 625 lb. ?

2. 1% of flour is fat; how many pounds of fat are there in 200 lb. of flour? In 150 lb.? In 500 lb.? In 625 lb.? 3. 37% of mutton is fat; how many pounds of fat are there in 500 lb. of mutton?

4. The distance from New York to San Francisco is about 3,300 mi. By how many inches is this distance represented on a map whose scale is 1 in. for every 100 mi.?

5. If a barometer reads 30 in. on 3 days in a week, 29.5 in. on 2 other days, and 30.1 in. on 2 others, what is the average height for the week?

6. If the thermometer registers 70° one day, 75° the next, and 84° the next, what is the average temperature for the three days?

7. How many buckets has the water-wheel? How many degrees in the angle between a

pair of spokes?

8. Read the thermometer and record the temperature at the same hour each morning for a week. Find the By how many degrees

average temperature for the week.

does this differ from the highest reading? From the lowest? Represent by a broken line.

9. A workman received $12 per week of 6 working days. His wages were raised to $14.40 per week; how much was the increase per day? How many per cent?

10. A mailing clerk was to address circulars according to a certain list. After having addressed 3,200, of the names on the list had not been used; how many names were there?