The mass of a uniform copper bar varies directly as its length. if a bar 40cm long has a mass of approximately 420g, find the mass of a bar 136 CM long.
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Mass of 40cm bar=420g
Mass of 1cm bar = 420/40g
=21/2
Mass of 136cm bar=136*21/2
=68*21
=1428 g
Mass of 1cm bar = 420/40g
=21/2
Mass of 136cm bar=136*21/2
=68*21
=1428 g
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