Question

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

Answer 1

Step-by-step explanation:

6 pipe = 60+20 min

6 pipe = 80 min

1 pipe = 80/6 min

for 5 pipe = 80×5/6

= 400/6

66.67 min or 1 hr 7 min approx