Question

One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill tank in 36 min, then the slower pipe alone will be able to fill the tank in ?
A) 85 min
B) 92 min
C) 187 min
D) 144 min

Answer 1

One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill tank in 36 min, then the slower pipe alone will be able to fill the tank in ?
A) 85 min
B) 92 min
C) 187 min
D) 144 min

Answer: D) 144 min

Explanation:

Let the slower pipe alone fill the tank in x minutes

then faster will fill in x/3 minutes.

Part filled by slower pipe in 1 minute = 1/x
Part filled by faster pipe in 1 minute = 3/x

Part filled by both in 1 minute =1/x + 3/x= 1/36

=> 4/x = 1/36

x = 36*4 = 144 mins 

Answer 2

Heyy mate ❤✌✌❤

Here's your Answer...

let faster pipe can fill total tank in x/3 min

slower pipe can fill the tank in 1/x min

1/x + 3/x = 1/36

x= 4*36

144 min
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