1.

A car travels along a straight line for first half time with aspeed of 40 km h- and the second half time with a speedof 60 km h . Find the average speed of the car.​

Answer»

Vavg=v1*t/2+v2*t/2/t

v1+v2/2

60+40/2

Vavg= 50km/hr



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