(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 0=1 £1 2 O O 2 (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 35. 7 d., how much will 18 articles cost? 18 art. :: 3s. 71d. : cost required. 18 articles at Is. will cost 18s. I art. (2) Find the cost of 59 cwt. at £2 17s. 41d. per cwt. I cwt.: 59 cwt. :: £2 175. 41d. : 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. 83d: sum required. The tax on £257 at 1s. in the £ S. d. =2575. S. d. (4) If I article weighs 2 cwt. 3 qrs. 24 lbs., what will 59 articles weigh? 1 art. 59 art. :: 2 cwt. 3 qrs. 24 lbs. : weight required. 59 articles at I cwt. each will weigh 59 cwt. CHAPTER VI. COMPOUND PRACTICE. Examples.-(1) Find the cost of 5 cwt. 2 qrs. 27 Ibs. at £2 4s. 4d. per cwt. I cwt. 5 cwt. 2 qrs. 27 lbs. :: £2 4s. 4d. : cost required. (2) If 17 cwt. o qrs. 16 lbs. cost £1, what weight may be bought for £2 8s. 93d.? £i£2 8s. 94d.: 17 cwt o qrs. 16 lbs. required. cwt. qrs. lbs. weight £ s. d. 17 0 16 weight for 1 o o 2 = O 5 026 OI 3 (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? Iton 28 tons 18 cwt. 2 qrs. 23 lbs. :: 9 oz. 6 dwts. cwt. qrs lbs. weight required. 16 grs. oz, dwts.grs. ΙΟ Ο 0 = 1 of 1 ton tons.cwts.qrs.lbs. I O O O 4 о 7 = 28 O O Ο ΙΟ Ο of 5 cwt. = 0 50 = of 5 cwt. I 3 8 = ΙΟ 0 0 0 16 0 0 7 = 1 of 1 cwt. O I 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 1s. 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 £I 10s.? I (6) Paid £1 for 375 pencils, how many would cost £145.? (7) How many articles may be bought for Li 6s. 8d. at the rate of 312 for £1? |