Physics - Kinematics Question with Solution | TestHub

The velocity of a body moving along the $x$-axis is given by the equation $v=3t^2$ where $t$ is in sec. \& $v$ in $\mathrm{m}/\mathrm{s}$. The body is at $\mathrm{x}=+36\mathrm{m}$ at $\mathrm{t}=0$. The average velocity (in $\mathrm{m}/\mathrm{s}$ ) of the body in the time interval between $\mathrm{t}=0$ and $\mathrm{t}=3\sec$.