A body moving with uniform acceleration of 5 m/s2 changes its velocity from initial value of 10 m/s to final value of  30 m/s. Find the time taken by it

Given that Initial velocity   u=10 m/s Final velocity    V=30 m/s Acceleration  a=5 m/s2∴ From kinematic equation of motion  V=u+at                                                               ⇒t=V−ua=30−105=205=4s