ans this que fast i will mark you brainliest
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Answer:
1. 40km/hr
2. 40-20/3-0
=20/3 this is in km. change it into m/s by multiplying it by 5/18
3. Constant
4.retardation is taking place in the path CD u can find in the similar way I did in 2 question
Step-by-step explanation:
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