Answer:
17 hours
Step-by-step explanation:
so first since there are 520 pages we divide it by 124 pages we get 4.19
4.19x4 = 16.77
Rounded is 17
40
A + B=75
A + C = 61
B = 5/3 *C
A+C * 5/3 = 75 then we got the answer