Question

a cistern can be filled by one taps in 5 by 2 hours and by another in 15 by 4 hours how long will it take to feel if there open together​

Answer 1

Answer:

1.5 hr

Step-by-step explanation:

A => 5/2 h

B=> 15/4 hr

let together they will fill it in x hrs

1/x = 1/5/2 + 1/15/4

1/x = 2/5 + 4/15

1/x = 10/15 => x = 15/10 = 3/2 hr

= 1.5 hr = 1 hr 30 min

Answer 2

Answer:

Step-by-step explanation:

A=5/2hrs

B=15/4hrs

Let together they will full it in x hrs

1/x=5/2+15/14

1/x=2/5+4/15

1x=10/15=x=15/10=3/2hrs

1.5hrs=1hrs30min