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Zarrin [17]
3 years ago
12

if a body moves with 20 km per hour in first 1 hour 30 km per hour in second one hour 40 kilometre per hour in third one hour wh

at os the average speed of body​
Physics
1 answer:
7nadin3 [17]3 years ago
4 0

Answer:

3pkm per hour

Explanation:

average is 30 km per hour

20 + 30 + 40= 90

90/3= 30

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