Answer:5
Explanation:
This is a variation question.
When m is inversely proportional to n,
m ∝ 1/n
Now, there is a constant of 100.
So the formula connecting m and n is
m=k/n where k is the constant
=>m=100/n
Now, n= 20 ( 20 printers)
Thus, m=
100/20=5 minutes.
Hope this helps :)