Question

if action and reaction are equal and opposite then why their ressult is not zero

Answer 1

because there are two bodies in action and reaction in the third law of motion and in the first law of motion the result is zero because on one body we are acting both actions

Answer 2

if action is zero then there is no reaction and if reaction is zero so there is no action therefore there result is not zero . if result is zero then it shows that no work done that is not possible according to newton