please do not solve , if you are not 100% sure about it, if answer is wrong i'll downvote it. At a certain factory, the total cost of manufacturing q units during daily production run is C(q) = 0.2q + q + 900 rupees. From experience it has been determined that approximately q(t) = + 100t units are manufactured during first t hours of production run. Compute the rate at which the total manufacturing cost is changing with respect to time 2 hours after production commences.