The speed of a boat in still water in 22 km/hr and the rate of current is 4 km/hr. The distance travelled downstream in 24 minutes is: Pick one.
A) 9.4 km  B) 10.2 km  C) 10.4 km  D) 9.2 km  E) None of these
Explanation :   Speed downstream = (22 + 4)= 
<gadget id="calculator">(22 + 4)</gadget>
<output>26</output>
26 kmph   Time= 24 minutes = 24/60 hour = 2/5 hour   distance travelled = Time × speed = (2/5)×26 = 10.4 km. Answer : Option 10.4 km
<result>C</result>
The speed of a boat in still water in 22 km/hr and the rate of current is 4 km/hr. The distance travelled downstream in 24 minutes is: