Question

Tap A can fill a tank in 10 minutes. Tap
B is for empty. If both taps start together,
than the tank will empty in 15 minutes
how much time tap B will take to empty
the tank?
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A fahit ich on 16 HE T
CGL T2
A​

Answer 1

Answer:

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Answer 2

Tap A can fill the tank in 15 minutes.

Then part of tank filled by Tap A in 1 minute =

15

1

​

Tap B can empty the tank in 20 minutes.

Then part of tank empty by Tap B in 1 minute =

20

1

​

If both the taps start functioning then part of the tank filled in 1 minute=

15

1

​

−

20

1

​

=

60

1

​

Now,  

60

1

​

part of the tank is filled in 1 minute.

So, time taken to fill the whole tank = 1×

1

60

​

=60 minutes