1.

1). 6 kg2). 4 gram3). 500 gram4). 3 kg

Answer»

In 1 kg mixture of iron FILINGS and sand, 25% is sand

⇒ Quantity of sand in the mixture = 250 grams

Let’s assume x grams iron filings is added, then mixture BECOMES (1000+ x) grams

∴ 5% of (1000 + x) = 250

⇒ 1000 + x = 5000

⇒ x = 4000 GRAM = 4 kg

Thus, 4 kg iron filings should be added, So that the proportion of sand becomes


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