The speed of a boat in still water is 8 kmph. If it can travel 1 km upstream in 1 hr, What time it would take to travel the same distance downstream?  Choose the correct choice from the following choices:
A) 14 minutes
B) 4 minutes
C) 24 minutes
D) 28 minutes
E) 23minutes
Speed of the boat in still water = 8 km/hr   Speed upstream = 1⁄1 = 1 km/hr   Speed of the stream = 8-1= 
<gadget id="calculator">8-1</gadget>
<output>7</output>
7 km/hr   Speed downstream= (8+7)= 
<gadget id="calculator">(8+7)</gadget>
<output>15</output>
15 km/hr   Answer is 4 minutes   Time taken to travel 1 km downstream= 1/15 hr = (1×60)/15= 4 minutes
<result>B</result>
The speed of a boat in still water is 8 kmph. If it can travel 1 km upstream in 1 hr, What time it would take to travel the same distance downstream?