Question

One tap can fill the tank in 20 minutes and the other can empty in 30 minutes. If both the taps are opened in how many minutes the tank would be full

Answer 1

Answer:

12 minutes

Step-by-step explanation:

A- taking 20 min

B-taking 30 min

A*B/A+B

20*30/20+30

600/50

12

Hope this help u

Answer 2

If both the taps are opened , then the tank would be filled in 60 minutes or 1 hour

Solution:

Given that,

One tap can fill the tank in 20 minutes

The other can empty in 30 minutes

Therefore,

The tap would fill 1/20 of the tank in a minute

And,

The tap would empty 1/30 of the tank in minute

If both the taps are opened in how many minutes the tank would be full ?

$\rightarrow \frac{1}{20} -\frac{1}{30}$

Here, minus sign denotes " empties the tank"

Solve it

$\rightarrow \frac{30-20}{20 \times 30}\\\\\rightarrow \frac{10}{600}\\\\\rightarrow \frac{1}{60}$

Thus, if both the taps are opened , then the tank would be filled in 60 minutes or 1 hour

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