60 sell'g price : 80 buy'g price : : 63 original quan. : x mix.
4 21

90X03 = ^^ gal. =mixture ;

— TT — 84—63=21 gal. water. Ans.
3

(54)
$1 : $3510 :: $.60 : a;=3570x.60=$2142.00, A's share ;

$1 : $1875 :: $.60 : a:= 1 8 t5x. 60 =$1125.00, B's share.
(55)
$3726 : $1 :: $2328.75 : a;=$.62i ^^U.=%0.62l Ans.
(56)

da. da. bottles. bottles.
30x3 : 7 :: 80 : a;=6| I||o = «/=6f bottles. Ans.
(57)

yd. yd. 8. d. d.
4f=\' : 40|=^ :: 14 8 = 176 : a:=$15.86|
• 2

17 n

5 1 ?3 00 15
3 9



160 SINGLK UULK OF THREE. [219.
(58)

OS ■ t ' ^ lb.
Uf : 1541x16 :: 1 : ar=1681b.
21 2

p 1 OV)

(59)

gaL gaL pt.
1 : 100 :: ^ : a;=93igal.
50

£??X^=750pt.=93}gaL An8.
1 *

(60)
23—19=4 miles gain and 96 to be gained.
nL ml* mi<

4 : 96 :: 23 : ar=552 miles. ^^^5 =552 miles. ^n«.
(61)

mine. mine.
i of f =if • 1 • • *^345 : ar=|17444
623

1 2$>

(62)

The minnte hand goes l2 times as fast as the hour hand :
hence it gains 11 minnte spaces while the honr hand moves
over one. At six, the honr hand is 30 spaces ahead: how
far does it move before it is overtaken ?

spaces. spaces. space, spaces.
11 : 30 :: 1 : a;=30-T- 11 = 2^^ spaces ;
Time 6 o'clock 32 minutes 43y^y seconds. Arts.
219-220.] SINGLE RULE OF THREE. 161

( 63 ) 28

'^ ft- 't- 100X5 ,,^.,.
7 : 196 :; 6 :. a;=140ft. — i^ — = UOft. Ans.
