Question

The rate of watering is Rs. 4 per ll.

6) Find the area of the cardboard required to make a closed box of length
25cm, 5m and height 15cm.
dim deep is to be made. It is open at the​

Answer 1

The area of cardboard required is 40750 cm².

Explanation:

Given:

Length (L) = 25 cm

Width (W) = 5 m = 5 × 100 = 500 cm

Height (H) = 15 cm

Area of the cardboard is same as the total surface area of the closed rectangular box.

Total surface area of the rectangular box is given as:

`SA=2(LW+WH+LH)\\\\SA=2(25* 500+500* 15+15* 25)\\\\SA=2(12500+7500+375)\\\\SA=2* 20375=40750\ cm^2`

So, the area of cardboard required is 40750 cm².