Question

a car is moving at a uniform speed of 40 km per hour from a to b and return with a uniform speed of 60 km per hour what is average speed of car

Answer 1

Answer:

average speed = 50 km

Explanation:

40+60/2

100/2=50

Answer 2

Answer:

HERE YOUR ANSWER.. PLZ FOLLOW ME

When a body travels equal distance with different velocities V1 and V2 , then Average Velocity is Calculated as

             Average Velocity = 2*V1*V2 / (V1 + V2 )

             here , V1 = 60 km/hr and V2 = 40 km/hr

     therefore ,

       Average Velocity = 2*60*40 / (60+40 )= 4800/100 = 48km/hr

Also we know that ,

           Average Velocity =  Total Distance / Total Time Taken

                     48 = 60 / Total Time Taken

                     or Total Time Taken = 60/48 = 5/4 Hrs .

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