Question

Pipe A can fill an empty tank
in 15 hours while pipe b takes
25 hours to fill it. Initially only
pipe A was turned on for a
while and immediately the
pipe b was turned on. It takes
about 19 hours to complete
the tank together. Pipe A was
run for how long.

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Answer 1

Answer:

Mar 10, 2020 — Pipe A can fill an empty cistern in 15 hours while Pipe B takes 25 hours to fill it. Initially only Pipe A is opened for some time and then closed and Pipe B ... In all, the cistern takes 19 hours to be full. How long was Pipe A open?

Step-by-step explanation:

Answer 2

Pipe A can fill in empty tank = 15hours.

Pipe B takes hours to fill it = 25hours.

Pipe A was turned on = Pipe B was turned on.

Pipe A takes hours to complete the tank together = 19hours.

Pipe A - Pipe B

15hours - 25hours = 10hours.

Mean that pipe A = pipe B. Mean that pipe A 10hours and pipe B 10 hours.

Total pipe A was run for long.

10hours × 19hours/ 2

= 180 / 2 hours

= 90 hours. ( Ans ).