Question

a tap has filled the tank in 20 h another faster tank he filled tank 10 hr the capacity of tank is 400 litre if both tap open same time than find how much time the tank will filled​

Answer 1

tank will fill in first ten hours

Answer 2

Answer:

In 1hr one tap fills 400/20 =20 L and another tap fills 400/10 =40L

So in 1 hr when both the taps are open 20+40=60L is filled

So 60L is filled in 1hr

Then 400 will be filled in 400/60 hr=20/3 hr=6hr 40 mt