72 divided by 9 = 8
8 + 4x4 = 8+16
8+16=24
#10 - 64°
#11 - 67°
#12 - 42in.
#13 - 45.5in.
#14 - i think it's 133.5 but i'm not sure.
Start at 8 a.m
First class and the break
8.00
1.00
-------- +
9.00
0.10
-------- +
9.10
Second class and the break
start at 9.10
9.10
1.00
------- +
10.10
0.10
-------- +
10.20
Third class and the break
start at 10.20
10.20
1.00
--------- +
11.20
0.10
-------- +
11.30
Fourth class (no break)
start at 11.30
11.30
1.00
-------- +
12.30
Fourth class end at 12.30
2 hours is equivalence of 120 minutes
If he reads 100 pages in 120 minutes,
the he reads (48 * 100) / 120 pages in 48 minutes = 4800/120 pages = 40 pages
He reads 40 pages in 48 minutes.