Question 117440
For printing 4500 pages it will take at 4500x6 sec = 450 mins. of printing = 7.5 hrs. of printing.
After every 1 hr. it shuts down for 2 mins. for cooling.
So, in the mean time there will be 7 shut down ocassions amounting to time = 7x2 = 14 minutes.
Hence, total time reqd is 450 + 14 = 464 minutes.