The ratio of the mass of sand to cement in a particular type of concrete is 4.8 : 2. If 6 kg of sand are used, how much cement is needed?
Answer: 2.5 kg
Explanation
Given ratio:
Sand : Cement = 4.8 : 2
Let's find the factor by which 4.8 is multiplied to get 6 kg of sand:
6 kg / 4.8 = 1.25
Now, multiply the cement ratio by this factor:
Cement needed = 2 × 1.25
= 2.5 kg
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