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A spring has an original length of 20 cm. When a load of 300 g is applied to the spring, it produces an extension

A spring has an original length of 20 cm. When a load of 300 g is applied to the spring, it produces an extension of 50 mm without exceeding the elastic limit of the spring. When a load of 240 g is applied to its free end, its length to 2 s.f. will be m.

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