Problema Solution
One pipe can fill a tank in 30 minutes, but a second pipe can fill in 25 minutes. how long will it take if both pipes are used?
Answer provided by our tutors
1/30 of the tank will be filled in 1 min by pipe A
1/25 of the tank will be filled by pipe B in 1 min
combinig together
1/30 + 1/25 of the tank will be filled in 1 min by both Pipe A + B.
ie. 11/150 (add them together) of the tank will be filled in 1 min by both Pipe A + B.
=> 150/11 min the entire tank will be filled!!!