Question

Find the area of the thin sheeting required for making an open cistern (i.e.without a lid), 5 m long, 3 m wide, 4 m deep.?

Answer 1

The area of the thin sheet would be 84 sq.m.

Answer 2

2(lb+bh+hl)+l*b
=2(15+20+12)+5*3
=30+40+24+15
=109cm sq.