Question

How much metal sheet is required to make closed rectangle box of length 4.5 cm, breath 2.5 and height 0.5.​

Answer 1

Answer:

Surface area=2lb+2bh+2hl

=2(lb+bh+hl)

=2(4.5×2.5+2.5×0.5+0.5×4.5)

=2(11.25+1.25+2.25)

=2(14.75)

=29.5 cm²

Thus, 29.5 cm² of metal sheet is required to make rectangular box.