s. d.

10 0 of 1| 120 articles=No. for £1

100=

(3) If 1920 articles cost £1, how many may be

bought for £2 18s. 6d. ?

s. d.

10 0 of 1| 1920 articles No. for £1

(4) If 784 articles weigh 1 cwt., how many articles will weigh 3 cwt. I qr. 23 lbs. ?

I cwt. 3 cwt. I qr. 23 lbs. :: 784 articles: No.

28. To find the cost, weight, &c., of any number

of things, when the cost, weight, &c., of 1 is given,

Rule. Find the cost, weight, &c., of the given number of things at a unit of the cost, weight, &c., multiply by the number of units, and take aliquot parts for the lower denominations.

Examples.-(1) If I article cost 3s. 7 d., how much will 18 articles cost?

I art.: 18 art. :: 3s. 74d. : cost required.
18 articles at IS. will cost 18s.

(2) Find the cost of 59 cwt. at £2 17s. 41d. per

cwt.

I cwt.

59 cwt. :: £2 17s. 43d. : cost required. Cost of 59 cwt. at £1 per cwt. = £59.

(3) What is the tax on £257 at 3s. 8d. in the £? £1: £257 :: 3s. 81d: sum required. The tax on £257 at 1s. in the £=257s.

6d. =

S. d.

S. d.

(4) If I article weighs 2 cwt. 3 qrs. 24 lbs., what will 59 articles weigh?

I art. 59 art. :: 2 cwt. 3 qrs. 24 lbs. weight

required.

59 articles at 1 cwt. each will weigh 59 cwt.

170

CHAPTER VI.

COMPOUND PRACTICE.

Examples.-(1) Find the cost of 5 cwt. 2 qrs. 27 lbs. at £2 4s. 4d. per cwt.

I cwt. 5 cwt. 2 qrs. 27 lbs. :: £2 4s. 4d. : cost

(2) If 17 cwt. o qrs. 16 lbs. cost £1, what weight

may be bought for £2 8s. 93d.?

£i: £2 8s. 9ąd. :: 17 cwt o qrs. 16 lbs.: weight

(3) If 9 oz. 6 dwts. 16 grs. of gold be given for I ton of steel, how much gold should be given for 28 tons 18 cwt, 2 qrs. 23 lbs. of steel?

I ton : 28 tons 18 cwt. 2 qrs. 23 lbs. :: 9 oz. 6 dwts.

A. (1) If 98 articles cost is., how many would cost is. 6d. ?

(2) If 144 nuts cost is., how many would cost Is. 3d.?

(3) How many articles may be bought for is. 4d., when 177 are sold for is. ?

(4) If Is. be given for 288 envelopes, how many may be bought for Is. 2d. ?

(5) If a parcel be carried 758 miles for £1, how far should it be carried for £1 10s.?

(6) Paid £1 for 375 pencils, how many would cost £145. ?

(7) How many articles may be bought for 1 6s. 8d. at the rate of 312 for £1?