Question

3/5 of cistern is filled in 1minute how much more time will be required to fill the of it

Answer 1

let time required = x

1 min = 60 seconds

3/5 of x = 60

3x/5 = 60

3x = 300

x = 300/3

x = 100 seconds

i.e. 1 minute 40 seconds will be required time to fill the cistern