A body covers 200 cm in the first 2 sec and 220 cm in the next 4 sec under constant acceleration. Then the velocity of the body after 7 sec is

A body covers 200 cm in the first 2 sec and 220 cm in the next 4 sec u

1.	A body covers 200 cm in the first 2 sec and 220 cm in the next 4 sec under constant acceleration. Then the velocity of the body after 7 sec is
Answer» `-15cm//s` `115cm//s` `10cm//s` `20cm//s` ANSWER :C