The extension in an elastic spring varies directly with the weight hung on it .if the weight 450 gm produces an extension of 3 cm , find the extension produced by the weight of 720 gm.
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The extension in an elastic spring varies directly with the weight hung on it .if the weight 450 gm produces an extension of 3 cm , find the extension produced by the weight of 720 gm.
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6 cm
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