Question

30 kilometre per hour at a uniform speed of 40 km and the next 30 km at a uniform speed of 20 km per hour find its average speed in kilometre per hour​

Answer 1

Answer:

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Answer 2

u= 40 km/ h

v= 20 km/h

avg. speed = (u+ v)/2 = (40+20)/2= 60/2 = 30km/h

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