The American Preceptor's Assistant: Containing a System of Practical Arithmetic
The American Preceptor's Assistant: Containing a System of Practical Arithmetic
Paul, Jeremiah
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p^r lb.'? Answer«M«f*MH^C)lb. 802s« of each* y Google »BE AM£RrCAN PiirCEMOit'S ASSISTAN^-i 14T CASE 4# ^ , When the rates of the simples, the quantity, and. tht n^an rate thereof are given, to £nd each simple i RULE. Link, and take the dtffereneea.as before $ As the sum of the differences^ Is to the quantity given ; So is each particular difference^ To the quantity required, EXAMPLES. l.vHow much wine at 4«. 5s. 5s. 6di and (5s. per gal- lon, must be taken to make a qiixture of 18 gallons^ wor...th 5s, 4d. per gallon ? G. G. G. G# 5 = 10 Am 6® •• 18 s: 10 to 3 at 4s. ^.1 -w^ 1 *-r3 = lO and 3 at 5$. •*^ ..l^ I,. . .^20 >0" 18:: Soto 6 at 5s. 6 =2a und 6 at es. ^ ^4, eo 2. How many gallon* of watei- must be mixed with .wine at 4s« per gallon, so as to £11 a vessel of 80 gallonsf that may be afforded at 2s. 9d. per gallon ? Answer 525 gal. water, 3. A grocer has 4 sorts of coffee, at 8d, V2dl 18d. and 22d. per lb. *^thc worst will not sell;: and the best is to» dear ; what quantity of each must he take, to make 120lb| $9 as to be sold at 1 6d.
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