Question

Question 1 (i)
A plastic box 1.5 m long, 1.25 m wide and 65 cm deep, is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine:
(i)The area of the sheet required for making the box.

Answer 1

It is given that, length (l) of box = 1.5 m
Breadth (b) of box = 1.25 m
Depth (h) of box = 0.65 m
(i) Box is to be open at top.
Area of sheet required
$=2lh+2bh+lb=[2\times 1.5\times 0.65+2\times 1.25\times 0.65+1.5\times 1.25]m^2=(1.95+1.625+1.875)m^2=5.45m^2$