A 3500 m line can be drawn from a new pencil having a 7 cm long lead .The new pencil fell and broke losing 1.5 cm of its lead .from the remaining lenght of the lead of the broken pencil ,a 2000 m long line was draw .what is the length in cm of the lead remaining in the pencil now solved
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3500m line drawn by ======= 7cm long lead
2000m line drawn by ======= 7*2000/3500 = 4cm long lead .
lead remaining in the pencil now = 7 - (4+1.5) = 1.5cm (Ans.)
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