A body travels 200 cm in the first two seconds and 220 cm in the next 4 secs with deceleration. The velocity of the body at the end of the 7th second is

Options

(a) 5 cm/s
(b) 10 cm/s
(c) 15 cm/s
(d) 20 cm/s

Correct Answer:

10 cm/s

Explanation:

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