21. A person walks 52 m to a shop near by and then 70m to a park. He takes 12 minutes complete
this. find the average speed of a person
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Explanation:
52+70=122mitre
time 12 minutes or 12/60
12 minutes need to go 122mitre
1 ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,122/12
60,,,,,,,,,,,,,,,,,,,122*60/12
=610MTR/hour
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