Question

4 / 5 of a cistern is filled in 1 hour . how long will it take to fill the cistern ?​

Answer 1

Answer:

5/4 hour

Step-by-step explanation:

4/5 is filled in 1 hour

1 will fill in 5/4 hours

Hope it helps

Answer 2

Answer:

1 hour 15 min

Step-by-step explanation:

let time fill cistern be x

4/5 × x=1

x=5/4hours

=5/4×60min

=75 min

= 1hour 15 min