a boy goes from his house to school by bus at a speed of 20 km per hour and returns back through the same route at a speed of 30 km per hour . The average speed of his journey is
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Answer:
25 kmph
Explanation:
(20kmph+30kmph)÷2
20kmph+30kmph)÷2=50kmph÷2
20kmph+30kmph)÷2=50kmph÷2=25kmph
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