The speed of a boat in still water in 20 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 24 minutes is:
Answers.
A) 9.6
B) 10.2
C) 9.2
D) 10.4
E) 9.0
Speed downstream = (20 + 3)= 
<gadget id="calculator">(20 + 3)</gadget>
<output>23</output>
23 kmph   Time= 24 minutes =24/60 hour = 2/5 hour   Distance travelled = Time × speed =2/5×23= 9.20 km   Answer is 9.2.
<result>C</result>
The speed of a boat in still water in 20 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 24 minutes is: