A pool which was 2/3 full to begin with, was filled at a constant rate for 3/4 hours until it was until it was 3/4 full. At this rate, how much time would it take to completely fill this pool if it was empty to begin with?
Answers.
A) 8 hrs 45 mins.  B) 9 hrs.  C) 9 hrs 30 mins.  D) 11 hrs 40 mins.  E) 15 hrs 30 mins
The pool was 2/3 full initially.   In 3/4 hrs, it was filled to 3/4 of its capacity.   Therefore, in 3/4 hrs, 3/4- 2/3 was the amount of volume filled.   So, 3/4 hrs = 3/4 - 2/3 = 1/12   Therefore, for filling the vessel from empty to full, you would require  3/4 * 12/1= 
<gadget id="calculator"> 3/4 * 12/1</gadget>
<output>9</output>
9 Hrs .   Hence 9 hrs.
<result>B</result>
A pool which was 2/3 full to begin with, was filled at a constant rate for 3/4 hours until it was until it was 3/4 full. At this rate, how much time would it take to completely fill this pool if it was empty to begin with?