Question

A body travels 200m in the first two second and 220m in the next four second. The velocity at the end of the seventh second from the start will be

A
10 ms1
B
15 ms1
C
220 ms1
D
5 ms1
Solution
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200=u(2)+12×a(2)2=2u+2a=200
u+a=100(1)

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