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14. Find the interest of $850 for 2 yr. at 6%.

MODEL.

6% = .06.
The interest for 1 yr. = $850 x .06 = $51.

The interest for 2 yr. = $ 51 x 2 = $102 Ans. 15. Find the interest of $600 for 3 yr. at 6%. At 5%. At 52%.

16. Find the interest of $250 for 41 yr. at 5%. At 6%. At 41%.

17. Find the interest of $ 400 for 1 mo. at 6%.

12 yr.

MODEL. 1 mo. =
$400 x .06 = $ 24 interest for 1 yr.

1 x $24 = $2 = interest for 1 mo. 18. Find the interest of $300 for 3 mo. at 6%. At 41%. At 5%.

19. Find the interest of $425 for 5 mo. at 6%. 20. Find the interest of $1000 for 9 mo. at 5%. At 6%. 21. Find the interest of $ 2000 for 10 mo. at 5%. At 6%.

LESSON 126

The Amount is the sum of the principal and interest. 1. Find the amount of $ 480 for 2 yr. at 6%.

MODEL. $480 x .06 = $28.80 = interest for 1 year.

$28.80 x 2 = $57.60 = interest for 2 yr.

$480 + $57.60 = $ 537.60, Amount.

2. Find the amount of $400 for 3 yr. at 5%.
3. Find the amount of $ 650 for 22 yr. at 6%.

4. Find the amount of $ 350 for 31 yr. at 4%.
5. Find the amount of $ 200 for 2 yr. 4 mo. at 6%.
6. Find the amount of $600 for 2 yr. 6 mo. at 5%.
7. Find the amount of $ 700 for 3

yr.

8 mo. at 6%. By the common method of reckoning interest it is customary to regard 30 days as a month and 360 days as a year.

8. Find the interest of $500 for 3 yr. 5 mo. 15 da. at 6%.

MODEL.

15 days = }, or } mo.
3
yr.

5 mo. = 41 mo.
3 yr. 5 mo. 15 da. = 411 mo.
$500 x .06 = $30 = interest for 1 yr.

$30 - 12 = $2.50 = interest for 1 mo.
$2.50 x 411 = $103.75 = interest for 3 yr. 5 mo. 15 da.
9. Find the interest of $ 600 for 2 yr. 7 mo. 20 da. at 5%.
MODEL. Time reduced to months - 31; mo.

$600 x .05 = $30 = interest for 1 yr.

$30 - 12 = $2.50 = interest for 1 mo. $2.50 x 313 = $79.16} = interest for 2 yr. 7 mo. 20 da.

Find the interest of $ 560 for 2 yr. 5 mo. 25 da. at

Find the interest of $ 325 for 4 yr. 3 mo. 18 da. at

Find the interest of $ 450 for 2 yr. 10 mo. 10 da. at

10. 5%.

11. 4%.

12. 6%.

13. 4%.

14. 5%.

Find the interest of $ 725 for 3 yr. 7 mo. 6 da. at

Find the interest of $ 840 for 2 yr. 11 mo. 5 da. at

REVIEW WORK

LESSON 127

1. How many board feet are there in a board 20 ft. long, 12 in. wide, and 2 in. thick ?

2. How many acres are there in a triangular piece of land whose base is 320 yd. and whose altitude is 242 yd. ?

3. Find the value, at $50 an acre, of a triangular field whose base is 16.5 ch. and whose altitude is 14.4 ch.

4. How much is a pile of wood worth at $4f a cord, if the pile is 16 ft. long, 8 ft. wide, and 4 ft. high?

5. When the length, breadth, and depth of a rectangular solid are given, how do you find its volume ?

6. Give the rule for finding the area of a triangle. 7. Find the cost of 33 ft. of wire fencing at $ 1.20 a rod. 8. 331% of 2 sq. yd. equals how many square feet ? 9. 3 sq. yd. is what part of 3 yd. sq. ? 10. Change to decimals and add: 16, 2o, 3o, §, 1. 11. Find the sum of 6.009, .06], .37, 6%.

12. A single roll of wall paper is 24 ft. long and 18 in. wide. How many square yards does it contain ?

13. A double roll of wall paper is 48 ft. long, and 18 in. wide. How many square feet does it contain ?

14. How many double rolls of paper will be needed for a ceiling 18 ft. by 20 ft.?

15. How many strips of ingrain carpet (1 yd. wide) will it take to cover a floor 22 ft. long by 18 ft. .wide, if the carpet is laid crosswise ? How many yards will be needed ?

16. If 21 cans of tomatoes cost $2.52, how much will 7 cans cost?

-10

GRAD. ARITH. V.

145

LESSON 128

1. What is the unit in Liquid Measure? How many cubic inches in a gallon ?

2. Allowing 72 gallons to equal one cubic foot, what is the capacity of a 10 gallon keg?

3. If lb. of tea costs $], how many pounds can be bought for $15?

4. A cubic foot of pure water weighs 621 lb. Find the weight of the water that will fill a tin box 2 ft. long, 18 in. wide, and 8 in. deep.

5. What part of an acre is a lot 8 rd. long and 4 rd. wide ?

6. If 4 of the quantity of onions costs $6}, what is the price of the whole quantity ?

7. 25% of a pound = how many ounces? 50% of a rod = how many feet ? 663% of a square foot = how many square inches ?

8. If a man loses 371 % of his money, what % of his money has he left ?

How many eighths of his money has he left ?

9. Draw a rectangle 4 in. long and 2 in. wide, and show 75% of it.

10. Which will hold the more, cubical boxes with 5-inch edges, or 5 cubical boxes with 4-inch edges ?

11. Find the perimeter of a rhombus whose edge is 5 ft. 6 in.

12. What is the area of a circle whose radius is 10 ft. ?

13. If I buy lemons at 16¢ a dozen, and sell them at the rate of 3 for 5%, how much is my profit on 150 lemons ?

LESSON 129

1. How many gills are there in 8 gal. 2 qt. 1 pt. 2 gi. ?

2. What is the value of a pile of wood 96 ft. long, 4 ft. wide, and 6 ft. high, at $3a cord ?

3. If 56 men can do a piece of work in 21 days, how long will it take 28 men to do it?

4. A butcher bought a number of sheep for $1040, and sold them for $ 1430. If he gained $1.50 on each sheep, how many did he buy?

5. Divide 8763} by 22.

6. If 5} tons of coal cost $32, how much will 3.663 tons cost? 7. How

many

board feet are there in a board 18.25 ft. long, 2.8 ft. wide, and 1 in. thick ?

8. Divide 94.5 by .126. Multiply .039 by .0009.

9. I bought a quantity of grain for $500, and sold it at a loss of 5%. How much did I receive for it?

10. A farmer sold of his potatoes at one time, and } at another, and had 48 bu. left. How many bushels had he at first?

11. If .75 of a ton of straw is worth $13.50, how much are 8.25 tons worth ?

12. Find the perimeter of a rectangle 8.1 ft. long and 6 in. wide. Find the area.

13. What is the least common multiple of 7 and 6 ?

14. Name three numbers of which 7 is the greatest common divisor.

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