I won’t Tell you the answer but I can tell you how to do it, so take 16 3/4 and divide it by 4 and you get your answer.
Answer:
I hope it helped you☺️☺️☺️☺️☺️
The drain pipe can drain (1/2) of the tank in 1 hour.
The fill pipe can fill (1/6) of the tank in 1 hour.
Working together, the pipes will drain the tank in (1/2) - (1/6) hours.
(1/2) - (1/6) = (3/6) -(1/6) = (2/6) or (1/3) of an hour.
So, working together, it will take 3 hours.
Your answer would be: 5+9+13+17+21+25+29+33+37+41+45+49+53+57+61+65+69+73+77+81+85=
945
