Question:
A cuboidal tin’ box opened at the top has dimensions 20 cm x 16 cm x 14 cm. What is the total area of metal sheet required to make 10 such
boxes?
Solution:
Dimensions of cuboidal tin box are20 cm x 16cm x 14 cm,
...Area of metal sheet for 1 box = Surface area of cuboid
= 2(lb + bh+hl)
= 2(20 x 16+16 x 14+ 14 x 20)
= 2(320 + 224 + 280)
= 2(824)
= 1648 c m2
... Area of metal sheet required to make 10 such boxes = 10 x 1648= 16460c m2
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