Ratio, Proportion

Quantitative Aptitude (MTS)

Title

45:30

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Indian Economy - Understanding the basics of Indian economic system

In 1 kg mixture of sand and iron, 20% is iron. How much sand should be added so that the proportion of iron becomes 10%?

1 kg

200 gms

800 gms

1.8 kg

In 1 kg mixture quantity of iron = 200 gm

Let x gm sand should be added, then

10% of (1000+ x) = 200

x = 1000 gm = 1kg