Total surface Area of first box = 2 (25 x 20 + 20 x 5 + 25 x 5) = 1450 cm2 Total surface area of second box = 2(15 x 12+ 12 x 5 + 15 x 5) = 630 cm2 Sum of total surface area of two boxes = 1450+ 630 = 2080 cm2 Total area of cood required for each boxes = 2080 × (1+
5
100
) = 2184 cm2 Cost of wooden for 250 boxes of each type = 2 5 0 x 4 x 2 1 8 4 = ₹ 2184000