Question

43.
Pipe A can fill a cistern in 36 minutes and
B in 48 minutes. If both the pipes are
opened together, when should pipe B be
closed so that the cistern may be just full
in 24 minutes ?
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ವರೆ
MA COMPETIAL CON PIDENTIAL CONFIDENTIAL CONFIDENTIAL CONFIDENTIAL CONFIDENCIAL CONTENTIAL CONCERTUAL COMPIDONTAL CORDEUTUAL GOWOLTIAL COUR T
(a)
(b)
(c)
8 mins
9 mins
12 mins
(d)
16 mins​

Answer 1

Answer:

Step-by-step explanation:

If tank is fill in 18 minutes so pipe 'x' will work for these 18 minutes

Pipe 'x' fills in 18 minuts =18×4=72 units

Remaining capacity = 96−72=24 units

So remaining capacity of tank/ cistern must be filled by pipe'y'

pipe y fills in 243=8 mins

So, after 8 minutes it must have been closed.