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Standard V

Mathematics

Solving Percentage Problems

A thin wire o...

Question

A thin wire of length $l$ when heated to a certain temperature increases its length by 1%. A sheet of the same material of area 2 $l \times l$ is heated to the same temperature. The percentage increase in area will be

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2.5%

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1.5%

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Solution

The correct option is B 2%
Because $β = 2 a,$
Percentage increase $= 2 %$

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A thin wire of length l when heated to a certain temperature increases its length by 1%. A sheet of the same material of area 2l×l is heated to the same temperature. The percentage increase in area will be

The correct option is B 2%Because β=2a,Percentage increase =2%

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The correct option is B 2%
Because $β = 2 a,$
Percentage increase $= 2 %$