Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the s

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Pipe A can fill in 20 minutes and Pipe B in 30 mins
and Pipe C can
empty the same in 40 mins.If all of them work
together, find the time
taken to fill the tank

Question Posted / kannans

5 Answers
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Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If al..

Answer / jayashree

1/20 +1/30 -1/40

30+20/600 -1/40

1/12 -1/40

7/120

then d answer ll be 120/7 this can be returns as 17 1/7mins

Is This Answer Correct ?

55 Yes

2 No

Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If al..

Answer / vishnu chaitanya g

120/7

Is This Answer Correct ?

34 Yes

1 No

Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If al..

Answer / ravi savaliya

a fill - 1/20 per minute
b fill - 1/30 per minute
c can empty - 1/40 per minute

Suppose this take x minute

1 x +1x - 1x
--- -- ---- =1
20 30 40

Solve this x=17(approximately)

Is This Answer Correct ?

29 Yes

8 No

Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If al..

Answer / vishnu gupthan nair

Volume = Gallons/Minute x Minutes ==> V = Rt
V = 20a = 30b = 40c

Express a and b in terms of c:

a = 2c

b = 4c/3

With all pipes open, the fill rate becomes:

R = a+b-c

R = 2c+4c/3-c

R = 7c/3

Time required is Volume / Fill Rate:

t = V/R

t = 40c/(7c/3)

t = 120/7

t = 17.14 minutes