Question

Two pipes A and B separately can fill an empty tank in 30 min and 45 min respectively if the both the pipes are opened simultaneously , it take to fill the empty tank​

Answer 1

Answer:

pipe A can fill a tank in 30 min

pipe A can fill a tank in 1 min = 1/30

pipe B can fill a tank in = 45 min

pipe B can fill a tank in 1 min =1/45

both A and B pipes can fill a tank in = 1/30 +1/45

= 3+2/90

=5/90

=1/30

to get correct we will do the reciprocal of answer so answer is = 30

pipe A and B can fill a tank in 30 min