A boy pushes a box of mass 2kg with a force → F = (20 ^ i + 10 ^ j...

\overset{\to}{F} = 20\overset{^}{i} + 10\overset{^}{j}

\overset{\to}{a} = \overset{\to}{F}m = \dfrac{20\overset{^}{i} + 10\overset{^}{j}}{2} ⇒ 10\overset{^}{i} + 5\overset{^}{j}

∴ \overset{\to}{s} = \dfrac{1}{2}\overset{\to}{a}{t}^{2} = \dfrac{1}{2}\left(10\overset{^}{i} + 5\overset{^}{j}\right) \times {\left(10\right)}^{2}

⇒ 50\left(10\overset{^}{i} + 5\overset{^}{j}\right)m

$∴$ Displacement along $x$-axis

$⇒ 50 \times 10 ⇒ 500m$