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Question
The area of the cardboard needed to make a box of size 25 cm × 15 cm × 8 cm is _________.
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Solution
The area of the cardboard needed to make the box of given size is same as the total surface area of the box.
Length of the box, l = 25 cm
Breadth of the box, b = 15 cm
Height of the box, h = 8 cm
∴ Area of the cardboard needed to make the box
= Total surface area of the box
= 2(lb + bh + hl)
= 2(25 cm × 15 cm + 15 cm × 8 cm + 8 cm × 25 cm)
= 2(375 cm2 + 120 cm2 + 200 cm2)
= 2 × 695 cm2
= 1390 cm2
Thus, the area of the cardboard needed to make the box of given size is 1390 cm2.
The area of the cardboard needed to make a box of size 25 cm × 15 cm × 8 cm is ___1390 cm2___.
The area of the cardboard needed to make the box of given size is same as the total surface area of the box.
Length of the box, l = 25 cm
Breadth of the box, b = 15 cm
Height of the box, h = 8 cm
∴ Area of the cardboard needed to make the box
= Total surface area of the box
= 2(lb + bh + hl)
= 2(25 cm × 15 cm + 15 cm × 8 cm + 8 cm × 25 cm)
= 2(375 cm2 + 120 cm2 + 200 cm2)
= 2 × 695 cm2
= 1390 cm2
Thus, the area of the cardboard needed to make the box of given size is 1390 cm2.
The area of the cardboard needed to make a box of size 25 cm × 15 cm × 8 cm is ___1390 cm2___.
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