We have been given that an employee shreds 341 pages in 11 minutes of work.
First of all we will divide 341 by 11 to find number of pages shred by employee in one minute.

Now let us multiply 31 by 20 to find number of pages shred by employee in 20 minutes.

Therefore, employee will shred 620 pages in 20 minutes.
Answer:
74.4 (llllllllllll ignore this i need 20 characters to answer)
It is 40.682414698, or about 40.7 feet of string.