A wagon travelling initially at a speed of 20 m/s accelerates uniformly at the rate of -3 m/s2 for a distance of 30 meters. The wagon's velocity after
it of
covering this distance is
m/s.

Imagine you are a business executive who wants to pursue an environment policy for your company that limits pollution and uses fewer raw materials but would cost more what might be the discussion to your next broad meeting how would you make your case to your shareholders