if 4/5 of a water tank is filled in 1 hour, how much time will be required to fill the rest of it?
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1 thought on “<br /><br />if 4/5 of a water tank is filled in 1 hour, how much time will be required to fill the rest of it?<br />​”

1. Answer:

   75 minutes

   as 4/5 of the tank take 6p minutes

   so the rest will take 15 minutes

   60+15 = 75 minutes

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