If 4/5th of a cistern Is filled in one minute, how much more time will be required to fill the rest of it.
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Answer:15 minute
Step-by-step explanation:
Let the volume of cistern be x
Volume filled in 1minute = 4/5x
Time taken to fill x litre = 5/4
Time taken to fill remaining 1/5x
= 5/4*1/5
=1/4 of a minute
= 15 minute
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