A boat can travel with a speed of 42 km/hr in still water. If the speed of the stream is 10 km/hr, find the time taken by the boat to go 84 km downstream Answers:
A) 1 hour 40 min
B) 2 hour 40 min
C) 1 hour 20 min
D) 1 hour 30 min
E) 1 hour 50 min
Speed of the boat in still water = 42 km/hr   speed of the stream = 10 km/hr   Speed downstream = (42+10)= 
<gadget id="calculator">(42+10)</gadget>
<output>52</output>
52 km/hr   Distance travelled downstream= 84 km   Time taken =distance/speed   =84/52   = 1.66 hours   = 1 hour 40 min.   1 hour 40 minNSWER:1 hour 40 min
<result>A</result>
A boat can travel with a speed of 42 km/hr in still water. If the speed of the stream is 10 km/hr, find the time taken by the boat to go 84 km downstream