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Solution-
(Situation1)
Number of pipes used=8
Time taken to fill the tank with given number of pipes=1hr 20min
=(1×60min)+20min
=60min +20min
=80min
(Situation2)
Number of pipes used now=6
Time taken to fill the tank=(80min×8)/6 [Less pipes ,more time]
=640min/6
=106.67min
Answer:6 pipes will take 106.67 min to fill the tank.
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Answer:
106.67 min
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