7. A box which is in the form of a cuboid has external dimensions 120 cm x 40 cm x 60
cm. Except the front and top face all the faces are to be covered with a brown paper.
Find the area of the
paper needed.
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1
Answer:
16800 cm^2
Step-by-step explanation:
length= 120 cm
breadth= 40 cm
height = 60 cm
area to be covered
= total surface area - (lb + lh)
= 2(lb + bh + lh) - (lb+lh)
= 2(120×40 + 40×60 + 120×60)-(120×40+120×60)
= 2(4800+2400+7200)-(4800+7200)
= 28800-12000
= 16800 cm^2
:. 16800 cm^2 area of paper needed
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