a car travels first 180 kilometre at 80 kilometre per hour and next 180 km at 70 kilometre per hour find its average speed
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Step-by-step explanation:
time taken in ist 180km = 180÷80=22.2
time taken in next 180km=180÷70=24.2
avg. speed= total distance÷total time taken
=180+180÷22.2+24.2=212.3
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