Question

23.

If 5 pipes can fill the tank in 1 hour, then 4 pipes will fill the

tank in _____________(hours).​

Answer 1

5 pipes can fill a tank in 1hr

So,

1 pipe will fill it in 5 hrs (1×5 -> time for one pipe)

4 pipes will take 5/4 hrs

4 pipes will take 1 hr 15 min

Answer 2

Answer:

Time in which tank will be filled be x

5/1 = 4/x

Therefore x = 5÷4 = 1.25

Therefore tank will be filled in 1 hour 25 minutes