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  4. A thin metal square plate has length l. When it is heated from 0° C to 100° C, its length increases by 1 %. What is the percentage increase in the area of the plate ?

Q. A thin metal square plate has length . When it is heated from to , its length increases by . What is the percentage increase in the area of the plate ?

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Solution:

Let original area of square plate is
New length,
New Area,
Percentage increase in area


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