The area of the sheet metal needed to make a box of size 7 cm $$\times$$ 8 cm $$\times$$ 9 cm is:
l = length = 7
b = breadth = 8
h = height = 9
The total surface area of the box = 2(lb+bh+lh)
=Â $$2\times(7\times8+8\times9+7\times9)$$
=Â $$2\times(56+72+63)$$
= $$2\times191$$
= 382Â $$cm^2$$
Create a FREE account and get:
Day-wise Structured & Planned Preparation Guide
By proceeding you agree to create your account
Free CAT Schedule PDF will be sent to your email address soon !!!
