The speed of the boat in still water in 12 kmph. It can travel downstream through 60 kms in 3 hrs. In what time would it cover the same distance upstream?	Choose the correct choice from the following answers:
A) 8 hours	B) 6 hours	C) 4 hours	D) 15 hours	E) 6 hours
Still Water=12km/hr   15 hoursownstream=60/3= 
<gadget id="calculator">60/3</gadget>
<output>20</output>
20km/hr   Upstream=&gt;&gt; still water=(u+v/2) =&gt;&gt; 12=u+20/2 = 4km/hr   So time taken in upstream = 60/4= 
<gadget id="calculator">60/4</gadget>
<output>15</output>
15hrs   ANSWER:15 hours
<result>D</result>
The speed of the boat in still water in 12 kmph. It can travel downstream through 60 kms in 3 hrs. In what time would it cover the same distance upstream?