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प्रश्न
Is the area of your belt the same as the area of the postcard? Why or why not?
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उत्तर
Area of the belt of 3 cm wide strip = length x breadth
= 3 × 42
= 126 square cm
Yes, this is equal to the area of the postcard.
In fact, area of all the belts would be equal to the area of the postcard; because every part of the postcard is being used in making a belt.
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