Boojho walks to his school which is at a distance of 3 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back on a bicycle with his friend and reaches home in 20 minutes. His average speed is
A)8.3 kmph
B)7.2 kmph
C)5 kmph
D)3.6 kmph
Answers
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Answer:
5 kmph
Explanation:
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