A pool which was 5/6 full to begin with, was filled at a constant rate for 5/3 hours until it was until it was 6/7 full. At this rate, how much time would it take to completely fill this pool if it was empty to begin with?  Choose the correct option:	A) 68 hrs 45 mins.	B) 70 hrs.	C) 68 hrs 30 mins.	D) 11 hrs 40 mins.	E) 15 hrs 30 mins
The pool was 2/3 full initially.   In 5/3 hrs, it was filled to 6/7 of its capacity.   Therefore, in 5/3 hrs, 6/7 - 5/6 was the amount of volume filled.   So, 5/3 hrs = 6/7 - 5/6 = 1/42   Therefore, for filling the vessel from empty to full, you would require  5/3 * 42/1= 
<gadget id="calculator"> 5/3 * 42/1</gadget>
<output>70</output>
70 Hrs .   Hence 70 hrs.
<result>B</result>
A pool which was 5/6 full to begin with, was filled at a constant rate for 5/3 hours until it was until it was 6/7 full. At this rate, how much time would it take to completely fill this pool if it was empty to begin with?