A car travels along a straight line for the first half time with speed 50 ℎ−1 and the second half time with speed 60 ℎ−1 . Find the average speed of the car.
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average speed= displacement/ time
let the total time be t
hence,
v1(speed) = 50km/h
d1= 50×(t/2)
=25t
d2= 60×(t/2)
= 30t
v= (d1+d2)/t
= 55t/t
=55
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