A tank can be filled by a pipe in 18 hours. Five hours after this pipe is opened, it is supplemented by asmaller pipe, which, by itself can fill the tank in 22 hours. Simultaneously, a drainpipe is opened, which, byitself, can completely empty the tank in 30 hours. Find the total time, measured from the opening of thelarger pipe, to completely fill the tank

b). 4320 have a nice day

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)