a certain concrete mix needs cement, fine aggregate, and coarse aggregate in the ratio 1:2:4. if the contractor has 25 kg of fine aggregate, how much quantity of the cement and that of the coarse aggregate is required to prepare the mix?
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Step-by-step explanation:
2x=25
x=25/2
cement=1x=1×25/2=12.5kg
coarse aggregate= 4x=4×25/2=50kg
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