Question

5. Two pipes can fill a tank in 3 h and 4 h
a
separately and a drain pipe can empty it in
6 h. If tank is empty and all pipes are opened
simultaneously, then number of hour to fill
the whole tank is
(a) 2 h 12 min
(b) 2 h 48 min
(c) 2 h 36 min
(d) 2 h 24 min​

Answer 1

Answer:

I think it is a

hope it h3lps i