Question

Q2.
Tap A can fill a tank in 12 hours, while
tap B can empty the full tank in 16 hours.
If both taps are open together, how long
will it take to fill an empty tank?
48 hours
50 hours

46 hours
51 hours​

Answer 1

Answer:

→Let, the total volume of the tank be x litres.

In case of first tap,

in 12 hrs, it supplies x litres of water

→So, in 1 hr it supplies x/12 litres of water

And, in case of 2nd tap,

in 10 hrs, it removes x/2 litres of water

In 1 hr, it removes x/20 litres of water

→Therefore after 1 hr the ultimate amount of water remaining in the tank, when both the taps are on..

=X/12-X/20.

=x/30

→Let the required number of hours be Y

Then (x/30) × Y=X

→Y=30 hrs

hope it helps you :)

Answer 2

Answer:

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