If a boat is rowed downstream for 96 km in 3 hours and upstream for 88 km in 11 hours, what is the speed of the boat and the river?
Choose the correct choice from the following options
A) 12 , 20
B) 20 , 20
C) 20 , 11
D) 20 , 12
E) 12 , 12
Explanation:   If x: speed of boats man in still water   y: speed of the river   20 , 12ownstream speed (20 , 12s) = x + y   Upstream speed (Us) = x â€“ y   x = (20 , 12s + Us) / 2   y = (20 , 12s â€“ Us) / 2   In the above problem 20 , 12s = 32 ; Us = 8   x = (32 + 8) / 2 = 40/2= 
<gadget id="calculator">40/2</gadget>
<output>20</output>
20 km/hr   y= (32 - 8)/2 = 24/2= 
<gadget id="calculator">24/2</gadget>
<output>12</output>
12 km/hr   ANSWER: 20 , 12
<result>D</result>
If a boat is rowed downstream for 96 km in 3 hours and upstream for 88 km in 11 hours, what is the speed of the boat and the river?