Question

11. A sheet of paper measures 40 cm by 25 cm. A strip of 5 cm width is cut from it all round. Find the area of the strip cut out.​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

If the measurement of a paper is 40 cm by 25 cm, and if the strip with 5 cm width is cut out from all its sides, then the area of the strip is 550$cm^{2}$

Step-by-step explanation:

Given,

Measurement of the paper = 40 cm by 25 cm

Area of the paper = 40*25 = $1000cm^{2}$

If 5 cm is cut from all around the paper, from each side of the paper 5 cm is lost

That is, 5 cm each is lost from the two sides measuring 40 cm

So, 40-(5*2) = 40-10 = 30 cm is the new measurement of one side

Similarly, 5cm each is lost from the two sides measuring 25 cm

So, 25-(5*2) = 25-10 = 15 cm is the new measurement of the other side

So the new measurement of the paper is 30 cm* 15 cm

The new area of the paper = 30*15 = $450cm^{2}$

So, the area of strip cut out = old area of paper - new area of paper = 1000-450 = 550$cm^{2}$