Question

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Answer 1

m1=200g=0.2kg;

delta L1=30cm=0.3m;

m2=0.45kg

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delta L2=?

$\frac{m1}{delta L1} = \frac{m2}{delta L2}\\\\\frac{0.2}{0.3} = \frac{0.45}{delta L2}$

delta L2 = 0.675m = 67.5cm