if a boat is rowed downstream for 24 km in 4 hours and upstream for 48 km in 24 hours, what is the speed of the boat and the river? Choose the correct choice from the following choices:
A) 4 , 3 B) 4 , 4 C) 3 , 3 D) 4 , 5 E) 4 , 2
<gadget id="calculator">48 / 24</gadget>
<output>2</output>

<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">2 + 6</gadget>
<output>8</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<result>E</result>
if a boat is rowed downstream for 24 km in 4 hours and upstream for 48 km in 24 hours, what is the speed of the boat and the river?
divide(add(divide(48, 24), divide(24, 4)), const_2)
"explanation : if x : speed of boats man in still water y : speed of the river downstream speed ( ds ) = x + y upstream speed ( us ) = x â € “ y x = ( ds + us ) / 2 y = ( ds â € “ us ) / 2 in the above problem ds = 6 ; us = 2 x = ( 6 + 2 ) / 2 = 8 / 2 = 4 km / hr y = ( 6 - 2 ) / 2 = 4 / 2 = 2 km / hr answer : e"