An empty pool being filled with water at a constant rate takes 8hours to fill to 3/7 of its capacity.how much more time will it take to finish filling the pool?  Choose the correct choice from the following choices: A) 5hr 30min B) 5hr 20min C) 4hr 48min D) 3 hr 12min E) 2hr 40 min
As pool is filled to 3/5 of its capacity then 2/5 of its capacity is left to fill.   To fill 3/5 of the pool took 8 hours --&gt; to fill 2/5 of the pool will take 8/(3/5)*2/5=16/3 hours = 5 hours 20 minutes (because if t is the time needed to fill the pool then t*3/5=8 --&gt; t=8*5/3 hours --&gt; to fill 2/5 of the pool 8*5/3*2/5=16/3 hours will be needed).   Or plug values: take the capacity of the pool to be 5 liters --&gt; 3/5 of the pool or 3 liters is filled in 8 hours, which gives the rate of 3/8 liters per hour --&gt; remaining 2 liters will require: time = job/rate = 2/(3/8) = 16/3 hours = 4 hours 48 minutes.   Answer: 4hr 48min.
<result>C</result>
An empty pool being filled with water at a constant rate takes 8hours to fill to 3/7 of its capacity.how much more time will it take to finish filling the pool?