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2 8 partnership.
Example 1.
A composition for welding cast steel consists of 9 parts of
borax and one part of sal-ammoniac. .
How much of each,
borax and sal-ammoniac, must be taken for a mixture of 5 lbs.?
Solution
:
jo X 5 = ±y
2 lbs. borax.
TV X 5 = Yz lb. sal-ammoniac.
Example 2.
An alloy shall consist of 160 parts of copper, 15 parts of tin
and 5 parts of zinc. How much of each will be used for a cast-
ing weighing 360 lbs.?
Solution
:
160 \%% X 360 = 320 lbs. of copper.
15 r¥o X 360 = 30 lbs. of tin.
5 tItt X 360 = 10 lbs. of zinc.
180
Example 3.
Four persons—A, B, C and D, are buying a certain amount,
of goods together. A’s part is $500, B’s, $100, C’s, $250, and
D’s, $150. On the undertaking they are clearing a net profit
of $120. How much of this is each to have?
Solution :
500 A’s Part = T%°o°o X 120 = $60
100 B’s " = tVA X 120 = 12
250 C’s " = TVo°o X 120 = 30
150 D’s " = tWo X 120 = 18
$1000
Example 4.
Two persons—A and B, are putting money into business, A,
$2,000 and B, $3,000, but A has his money invested in the busi-
ness 2 years and B ’i]/
2 years ; the net profit of the undertaking
is $2,300. How much is each to have of the profit ?
Solution:
A, 2000 X 2 = 4000
B, 3000 X 2% = 7500
11500
A’s Part is T\%%% X 2300 = $ 800
B’s " " TT
5
5°o°o X 2300 = 1500
In cases like this it must be taken into consideration that
the time is not equal ; B has not only had the largest capital in-
vested but he has also had the capital at work in the business
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