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 thepaper needed.

7. A box which is in the form of a cuboid has external dimensions 120

1.	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 thepaper needed.
Answer» 16800 cm^2Step-by-step EXPLANATION:LENGTH= 120 cmbreadth= 40 cmheight = 60 cmarea 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