\fdO'^ - Old Forge Coal Mines

ARITHMETIC. 13
If a mechanic earns $1,500 a year and his expenses are
per year.
per year, then he would save 11500—1968, or $532
9 6 8
$532
If he saves $532 in 1 year, to save $3,724 it would take as
many years as $532 is contained times in $3,724, or 7 years.
532)8724(7 years. Ans.
3724
(20) If the freight train ran 365 miles in one week, and
3 times as far lacking 246 miles the next week, then it ran
(3 X 365 miles) — 246 miles, or 849 miles the second week.
Thus,
3 6 5
3
1095
246
difference 8 4 9 miles. Ans.
(21) The distance from Philadelphia to Pittsburg
miles. Since there are 5,280 feet in one mile, in 354 miles
is 354
there are 354 X 5,280 feet, or 1,869,120 feet. If the driving
wheel of the locomotive is 16 feet in circumference, then in
going from Philadelphia to Pittsburg, a distance of 1,869,-
120 feet, it will make 1,869,120 -=- 16, or 116,820 revolutions.
16)1869120(116820
•
16
26
rev. Ans.