182-When a thin rod of length -L- is heated from t1 deg-C to t2 deg-C length increased by 1

Percentage #160;increase #160;in #160;area: #9651;AA #215;100=2 #215; #9651;LL #215;100 #160; #160; #160; #160; #160; #160; #160; ...

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182.When a th...

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182.When a thin rod of length "L" is heated from t1°C to t2°C length increased by 1%.If plate of length 2l and breadth 'l' made of same material is heated from t1°C to t2°C, percentage increase in area is

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Solution

$Percentage increase in area : \frac{△ A}{A} \times 100 = 2 \times [\frac{△ L}{L} \times 100] = 2 \times 1 = 2 % Ans : 2 %$

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182.When a thin rod of length "L" is heated from t1°C to t2°C length increased by 1%.If plate of length 2l and breadth 'l' made of same material is heated from t1°C to t2°C, percentage increase in area is

Percentage increase in area:△AA×100=2×△LL×100 =2×1 =2%Ans:2%

$Percentage increase in area : \frac{△ A}{A} \times 100 = 2 \times [\frac{△ L}{L} \times 100] = 2 \times 1 = 2 % Ans : 2 %$