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SAHMOM, thank you so much.

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(a)

number of screws ——- 2u

number of nails ——- 1u

1054 – 646 = 408

408/2 = 204 (mass of 1u of nails)

(b)

1054 – 204 = 850 (mass of 2u of screws)

850/2 = 425 (mass of 1u of screws)

425 – 204 = 221

221/13 = 17 (number of screws/nails in 1u)

Ans : (a) 204g; (b) 17 nails.

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thank u siglapmath

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thank u siglapmath

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