Question

Two taps can fill a tank in 4 hours and 5 hours. If two taps are operated simultaneously,In how much time will the tank be filled? *
2 points
19/9 hrs
20/9 hrs
21/9 hrs
22/9 hrs​

Answer 1

Answer:

20/9 hrs

Step-by-step explanation:

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Answer 2

Answer:

$\frac{20}{9} hrs$

2 taps fill a tank in 4 hrs. and 5 hrs.

In 1 hrs. they fill (1/4 + 1/5) part = 9/20 part

so, completely fill the tank in 20/9 hours.