Question

Mr. Sandeep was placing an order with his carpenter to make wooden boxes to pack his cotton toys which were to be delivered to his friend. Sandeep wanted 2 types of boxes. The larger one with a dimension of 25cm x 20cm x 5cm and the smaller box with a dimension of 15cm x 12cm x 5cm. Sandeep also told the carpenter that 5% of total surface area is required as extra to cover the overlaps. If the cost of the wood is Rs.4/- cmz, the cost of wood required for supplying 250 boxes of each type would be Rs. ______.[Note:-D0 NOT include spaces in your answer)

Answer 1

To determine the cost of wood required for 250 boxes of each type, we need to calculate the total surface area of both types of boxes, including the extra 5% for overlaps.
1. Surface Area Calculation:
- Larger Box:
Dimensions: 25 cm x 20 cm x 5 cm
Surface Area = 2(lw + lh + wh)
$= 2(25 \times 20 + 25 \times 5 + 20 \times 5)$
$= 2(500 + 125 + 100)$
$= 2 \times 725$
$= 1450 \text{ cm}^2$
Including 5% extra:
$= 1450 \times 1.05 = 1522.5 \text{ cm}^2$
- Smaller Box:
Dimensions: 15 cm x 12 cm x 5 cm
Surface Area = 2(lw + lh + wh)
$= 2(15 \times 12 + 15 \times 5 + 12 \times 5)$
$= 2(180 + 75 + 60)$
$= 2 \times 315$
$= 630 \text{ cm}^2$
Including 5% extra:
$= 630 \times 1.05 = 661.5 \text{ cm}^2$
2. Total Surface Area for 250 Boxes of Each Type:
- Total for larger boxes:
$= 250 \times 1522.5 = 380625 \text{ cm}^2$
- Total for smaller boxes:
$= 250 \times 661.5 = 165375 \text{ cm}^2$
- Total Surface Area:
$= 380625 + 165375 = 546000 \text{ cm}^2$
3. Cost Calculation:
Cost of wood = Total Surface Area $\times$ Cost per cm$^2$
$= 546000 \times 4 = 2184000 \text{ Rs}$
Thus, the cost of the wood required for supplying 250 boxes of each type is Rs. 2184000.