1.

Example 3.11 A car covers the first half of the distance betweentwo places at a speed of 40 km/h and second half at 60 km/hCalculate the average speed of the car.

Answer»

v1 = 40 km/h v2 = 60 km /hAverage speed v = (v1 + v2)/2 v = (40 + 60)/2= 50 km /h



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