Question

6 pipe are required to fill the tank in 1 hour 20 minutes how long will it take to fill if only five types of same type are used​

Answer 1

Answer:

1 hour 36 min

Step-by-step explanation:

firstly 6 pipes can fill the tank in 80 min

next 1 pipe can fill the tank in 80 ×6=480min

so 5 pipe can fill it in 480÷5=96 min= 1 hour 36 mins