The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hourr. The distance travelled downstream in 24 mins is?  Select the correct option
A) 6 km B) 7 km C) 7.2 km D) 8 km E) 8.4 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=2460×18=2×185 = 7.2 km   7.2 km
<result>C</result>
The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hourr. The distance travelled downstream in 24 mins is?