Question

i tick the right answer , kindly give answers step - by - step .

otherwise I will spam it .

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Answer 1

Answer:

a a b

Step-by-step explanation:

1) 1/a+1/b+1/c = 1/together

1/9+1/6+1/c=1/3

1/c =1/3-5/18

1/c = 1/18

c=18 days

2) both are emptying so same sign

1/a+1/b=1/together

1/45+1/30=5/90=1/together

together =90/5 =18

3) same concept here also but here 2 are filling and 1 emptying

1/60+1/75-1/c=1/50

1/c=3/300

c=100