Question

A body is moving with uniform acceleration covers 200 m in the first 2 s and 220 m in the next 4
s. The velocity of the body after 7 s is​

Answer 1

Answer = 100 m per sec

200 = 2u + 2a

420 = 6u + 18 a

1800 -420 = 12 u

u = 1380/ 12

12a = -180

a = -180/12

v(7) =( 1380 - 180)/12 = 100 m sec^-1