Question

The length breadth and height of a rectangular box are a 80 40 cm and 20 CM respectively if a square paper of 40 cm length is to be closed on it
how many such paper will be required?

Answer 1

Step-by-step explanation:

Total surface area of the rectangular box =

2 (l×b + b×h + l×h)

= 2 ( 80×40 + 40×20 + 80×20 )

= 2 ( 3200 + 800 + 1600)

= 2 × 5600

= 11200 cm^2

Area of 1 square paper = 20×20 = 400 cm^2.

Therefore, no. of such square papers required

= 11200 ÷ 400

= 28

Hence, 28 such square papers will be required.