If jeya rows 21 km upstream and 56 km down steam taking 3 hours each, then the speed of the stream  Choose the correct choice from the following answers.
A) 1.5 kmph  B) 0.2 kmph  C) 0.3 kmph  D) 0.4 kmph  E) 0.5 kmph
Speed upstream = 21/3= 
<gadget id="calculator">21/3</gadget>
<output>7</output>
7 kmph   Speed down stream= 56/7= 
<gadget id="calculator">56/7</gadget>
<output>8</output>
8 kmph   Speed of stream= ½ (8-7) = 0.5 kmph   ANSW0.5 kmphR:0.5 kmph
<result>E</result>
If jeya rows 21 km upstream and 56 km down steam taking 3 hours each, then the speed of the stream