A cuboid has a rectangular base of length 12cm and breadth 7cm. Its volume is 1260cm3.
a. (i) Determine the height of the cuboid.
b. (ii) Calculate the total surface area of the cuboid.
c. (iii) All the faces of the cuboid are to be painted at the rate of ₹5 per 100cm2. Find the total cost of painting.