Question

1
Single Answer Type
Review Later
B in 18 minutes and pipe C can empty the
full tank in 36 minutes. If all of them are
opened simultaneously, then the time
taken to fill the empty tank is
A
7 minutes
B
8 minutes
С
9 minutes
D
None of these​

Answer 1

Answer:

your answer is option b

Answer 2

Answer:

Part filled in 7 min =7×(

36

1

+

45

1

)=

20

7

Remaining part =1−

20

7

=

20

13

Net part filled in one minute when A, B and C are opened =

36

1

+

45

1

−

30

1

=

60

1

20

13

part is filled in 60×

20

13

=39 mins

Total time taken to fill the tank =(39+7)=46 min

Step-by-step explanation:

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