7. A train travelled at a speed of 70 km/hr for 5 hours and then at 90 km/hr for next 3 hours. Calculate it's average speed . the answer of this question is 77.5 km/hr and I want the explanation. and if you will spam your answer will be reported
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Answer:
20 kmph
Step-by-step explanation:
formula to find average speed = total speed / total time
total speed = (70 + 90) kmph = 160 kmph
total time = (5 + 3) hrs = 8 hrs
therefore, average speed = (160/80) = 20 kmph
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