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Grade: 10
        
A river has width 0.5 km and flows from west to east with a speed 30 km per hour if a boat man starts sailing his boat at a speed 40 km per hour normal to bank the boat shall cross the river in time 
one year ago

Answers : (1)

Shubham Kumar
54 Points
							
the time taken will be s/v and here s(distance)=0.5 km and v(velocity)=40 km/h ,therefore the time taken will be 45 seconds .the flow is in a direction perpendicular to the direction of movement therefore there will not be any other force actinf in the way of crossing and it can be caalculated as usual.
one year ago
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