Question

If the perimeter of a rectangular room having height 4 m is 40 m ,find the area of four walls.

Answer 1

Perimeter is 2(l+b)

2(l+ 4)=40

L=16m

Lateral surface area=2(lb+bh+lh)

2(16×4+4×4+16×4)

2(64+16+64)

2×144

=288m^2(Answer)