The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 24 minutes is Choose the correct choice from the following answers.
A) 17.2 km B) 7.2 km C) 7.6 km D) 17.6 km E) 27.2 km
speed of a boat in still water = 15 km/hr   Speed of the current = 3 km/hr   Speed downstream = (15+3)= 
<gadget id="calculator">(15+3)</gadget>
<output>18</output>
18 km/hr   Distance travelled downstream in 24 minutes=(24/60)×18=(2×18)/5 = 7.2 km   Answer is 7.2 km
<result>B</result>
The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 24 minutes is