question_answer

6 pipes are required to fill a tank in 1 hour 20 minutes. How long will it take if 5 pipes of the same type are used?

Answer:

No. of pipes	5	6
Time taken	x min.	80 min.

                                                                                                                                       

Let x be the time taken to fill the tank with 5 pipes.

So,       \[\frac{6}{5}\times 80=x\]

\[\Rightarrow \,\,\,\,\,\,\,\text{ }x=16\times 6\]

\[\Rightarrow \text{ }\,\,\,\,\,\,x=96\text{ }min\]

or x = 1 hour 36 minutes.