Question

pipe a can fill the tank in 10 hours and pipe B can fill the tank in 20 hours if pipe a and B fill the tank simultaneously then at what time the tank will be filled completely​

Answer 1

Answer:

15hours

Step-by-step explanation:

pipe A : 10 : hours

pipe B : 20 : hours +

= 10 + 20 = 30

now we can divid 30 ÷ 2

=15.

Answer 2

Answer:

Step-by-step explanation:

Tank filled by A in 1 hour = 1/10

Tank filled  by B in 1 hour =1/20

Tank filled  by both of them in one hour=1/10 + 1/20

                                                                    =     3/20

Tank will be filled in 1 divided by 3/20 hour

=20/3 hour

=6 hour 40 min