Question

the lid of a rectangular box of sides 40 cm by 10 cm is sealed all round with tape.
what is the length of the tape?
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Answer 1

Answer: Since the lid of a box is rectangular and is sealed all around with tape, hence, the required tape length will be equal to the perimeter of the rectangle = 2 (Length + Breadth)

Step-by-step explanation:   Now, the total length of the tape required = Perimeter of the rectangle

From the figure, Length = 40 cm, Breadth = 10 cm.

Thus, by substituting in the formula,

⇒ Perimeter = 2 (Length + Breadth)

⇒ 2 (40 + 10)

⇒ 2 × 50 = 100 cm

Thus, the tape length required is 100 cm.

hope it helps