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A meter washer has a hole of diameter d1 and an external diameter d2 , where 3d2 = d1. On heating, d2increases by 0.3%. Then d1 will

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A meter washer has a hole of diameter d<sub>1</sub> and an external diameter d<sub>2</sub> , where 3d<sub>2</sub> = d<sub>1</sub>. On heating, d<sub>2</sub>increases by 0.3%. Then d<sub>1</sub> will






 
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