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A body starts from rest with a uniform acceleration of 2m/s $^{2}$ for 10 sec , with moves with constant speed for 30 sec then decelerates by 4 m/s $^{2}$ to zero . What is the distance covered by the body?
750 m
850 m
950 m
1050 m

A

750 m

B

950 m

C

850 m

D

1050 m

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