# Arithmetic Aptitude :: Ratio & Proportion

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## 8. Sand and cement were mixed in the ratio 3 : 1 to make up 1 tonne. How much sand must be added to make the ratio 6 : 1 ?

**Answer:**

**Option B**

**Explanation :**

Let amount of sand and cement as 3x and x

3x+x = 1000kg

x = 250

Sand : cement => 750 : 250

(750+y)/250 = 6/1

=> y = 750 kg.

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