Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση

When tare and cloff are allowed : Deduct the tare and trett as before, and divide the suttle by 168 (because 2 lb. is the ide of 3 cwt.) the quotient will be the cloff, which subtract from the suttle, and the reinainder will be the neat weight.

EXAMPLES.

1. In 3 hogsheads of 'Tobacco, each weighing 13 cwt. 3 qrs. 24 lb. gross, tare 107 lb. per hogshead, trett 4 lb. per 104 lb. and cloff 2 lb. per 3 cwt. as usual; how much neat.

cut. qrs. lbs.
13 3 23
4

55 28

443

112

1563 lb. gross of 1 hhd.

3

4689 whole gross. 107 X3= 321 tare.

26, 4368 suttle.

168 trett.

168)4200 suttle.

25 cloff.

Ans. 4175 neat weight. 2. What is the neat weight of 26 cwt. 3 qrs. 20 lb. gross, tare 52 lb. the allowance of trett and cloff as usual ? Ans. neat 25ewt. 1gr. 5lb. 1oz. nearly ; omitting

further fractions.

INTEREST.

INTEREST is of two kinds ; Simple and Compound.

SIMPLE INTEREST. Simple Interest is the sum paid by the borrower to the lender for the use of money lent; and is generally at a certain rate per cent. per annum,

which in several of the United States is fixed by law at 6 per cent. per annum; that is 61., for the use of 1001. or 6 dollars for the use of 100 dollars for one year, &c.

Principal is the sum lent.
Rate, is the sum per cent. agreed on.
Amount, is the principal and interest added together.

CASE I.
To find the interest of any given sum for cne year.

RULE. Multiply the principal by the rate per cent and divide the product by 100 ; the quotient will be the apswer.“

EXAMPLES.

1. What is the interest of 391. 11s. 8fd. for one year at 61. per cent. per annum ?

d. 39 11 81

6

237. 108

20

7150
12

6/03

0/12 Ans. £2. 73. 6d.io. %. What is the interest of 2361. 10s. 4d. for a year, ut 6 per cent. ?

Ans. £11 16s. 6d.

3. What is the interest of 5711. 13s. 9d. for one year, at 6l. per cent. ?

Ans. £34 6s. 04d. 4. What is the interest of 21. 123. 9 d. for a year, at 61. per cent. ?

Ans. £0 38. 2d.

FEDERAL MONEY. 5. What is the interest of 468 dols. 45 cts. for one rear at 6 per cent. ? $ cts.

468, 45

6

28/10, 70=$28, 10cts. 7m. Ans. Here I cut off the two right hand integers, which divide by 100: but to divide federal money by 100, you ńced only call the dollars so many cents, and the inferior denominations decimals of a cent, and it is done.

Therefore you may multiply the principal by the rate, and place the separatrix in the product, as in multiplicafion of federal money, and all the figures at the left of the separatrix, will be the interest in cents, and the first figure on the right will be mills, and the others decimals of a till, as in the following

EXAMPLES

6. Required the interest of 135 dolls. 25 cts. for a year at 6 per cent.

$ cis, 135, 25

6

811, 50=88, 11cts. 5m. Ans. 7. What is the interest of 19 dollars 51 cents for one fear, at 5 per cent. ? $ ct3.

19, 51

5

97, 55=97cts. 51 m. Ans. 8. What is the interest of 436 dollars for one yearg af 6 per cent. ?

6

Ans. 2616cts.=$26, 16cts.

ANOTHER METHOD Write down the given principal in cents, which multiply by the rate, and divide by 100 as before, and

you

will have the interest for a year, in cents, and decimals of a cent, as follows:

9. What is the interest of $73, 65 cents for a year, at 6 per cent. ? Principal 7365 cents,

6

Ans. 441, 90cts.=44146 cts. or $4, 41cts. 9m. 10. Required the interest of $85, 45cts for a year, at y per cent ?

Cents.
Principal 8545

7

Ans. 598, 15 cents,=$5, 98 cts. find

CASE II.

any sum of

for any

To find the simple interest of

money, number of years, and parts of a year.

GENERAL RULE. 1st Find the interest of the given sum for one year

2d. Multiply the interest of one year by the giver number of

years,

and the product will be the answer for that time.

3d. If there be parts of a year, as months and days, work for the months by the aliquot parts of a year, and for the days by the Rule of Three Direct, or by allowing 30 days to the month, and taking aliquot parts of the same.*

* By allowing the month to be 30 days, and taking aliquot paris thereof, you will have the interest of any ordinary sum sufficiently ex act for common use; but if the sum be very large, you may say,

As 365 days: is to the interest of ore year:: so is the given number of days : to the interest required.

LXAMPLES.

1. What is the interest of 75l. 88. 4d. for 3 years and 2 months, at 6l. per cent. per annum? £. d. 75 8

£. d. 6 2 mo=3)4

10 6 Interest for 1 year.

5 4 52 10 0 20

22 12 6 do. for five years.

0 15 1 do. for 2 months. 10/50 12

£23 ng Ans

600

2. What is the interest of 64 dollars 58 cents for 3 years, 5 months, and ten days, at 5 per cent?

$ 64,58

5

(322,90 Interest for 1 year in cents, per

3

[Case f.

1968,70 do. for 3 years.
4 mo. f 107,63 do. for 4 months.

26,90 do. for 1 month.
10 days, } 8,96 do. for 10 days.

1 mo.

Ans. 1112,19–1112cts. or $ 11,12c. 1%. 3. What is the interest of 789 dollars for two years, at 6 per cent.?

Ans. $ 94,68cts. 4. Of 37 dollars 50 cents, for 4 years, at 6

per

cent per annum ?

Ans. 900cts. or $9. 5. Of 325 dollars 41cts. for 3 years and 4 months, at 5 per cent. ?

Ans. $54,23cts, 5m. 6. of 3251 12s. 3d. for 5 years, at 6 per

cent.?

Ans. £97 13s. 8d. n. Of 1741. 10s. 6d. for 3 and a half years, at 6 per eent.?

Ans. £36 13s. 8. Of 1501. 165. 8d. for 4 years aud 7 months, at 6

Ans. £41 45.71.

per cent.?

« ΠροηγούμενηΣυνέχεια »