Rishi has set up hydroponics on his terrace. He has connected the water bed to four water inlets
A
,
B
,
C
,
D
. The problem is that water flow from all these inlets is not the same. If A and D inlets are used, the water bed fills up in 20 minutes. If B, C, and D are used, the water bed fills up in 15 minutes. If A, B, and C are used, it takes 12 minutes to fill up the system. If Rishi was in a rush, what is the fastest time
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Answer:
i think acd will take less time
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