The total cost C(x) in rupees associated with the production of x units of an item is given by $C(x) = 0.007 x^3 - 0.003 x^2 + 15x + 4000$. Find the marginal cost when 10 units are produced.

Question

$(A)\; Rs 1.704$
$(B)\; Rs 17.04$
$(C)\; Rs 170.4$
$(D)\; Rs 1704$