**Shanti Sweets Stall was placing an order for making cardboard boxes for packing their sweets. Two sizes of boxes were required. The bigger of dimensions 25 cm × 20 cm × 5 cm and the smaller of dimensions 15 cm × 12 cm × 5 cm. For all the overlaps, 5% of the total surface area is required extra. If the cost of the cardboard is Rs 4 for 1000 , find the cost of cardboard required for supplying 250 boxes of each kind.**

**Solution:**

Length of bigger cardboard box cm

Breadth of bigger cardboard box cm

Height of bigger cardboard box cm

**Surface area of bigger cardboard box**

** **

**Surface Area of 250 bigger cardboard boxes ** ** (1)**

Length of smaller cardboard box cm

Breadth of smaller cardboard box cm

Height of smaller cardboard box cm

**Surface area of smaller cardboard box**

** **

**Surface Area of 250 smaller cardboard boxes ** **(2)**

Adding **(1)** and **(2)**, surface area of 250 smaller and 250 bigger boxes

It is given that 5 % extra of total surface area is needed for the overlaps. Therefore, total surface area needed for making boxes including overlaps percent of

of cardboard costs Rs 4

1 of cardboard would cost Rs

546000 of cardboard would cost Rs ( **Rs 2184**