If a metal slab of size 1mxx20 c mxx1...

If a metal slab of size `1mxx20 c mxx1c m` is melted to another slab of 1 mm thickness and 1 m width, then the length of the new slab thus formed will be (a) 200 cm (b) 400 cm (c) 600 cm (d) 1000 cm

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