5 pages ------------------ 20 min
1 page ------------------ X
x = (1 x 20) / 5
x = 20/5
x = 4 min
Then
1 page ------------------- 4 min
11 pages --------------- x
x = (11 x 4) / 1
x = 44 / 1
x = 44 min
5.6m questions
7.3m answers