To make concrete, it requires 8 parts crushed gravel, 7 parts water, and 5 parts cement mix. A worker needs to make 220 kg of concrete. How much crushed gravel, water, and cement mix is needed?
Answer (2)
a) 8 + 7 + 5 = 20 parts b) 220 kg ÷ 20 = 11 c) 8 parts crushed gravel: 8 x 11 = 88 kg 7 parts water: 7 x 11 = 77 kg 5 parts cement: 5 x 11 = 55 kg
To make 220 kg of concrete, you need 88 kg of crushed gravel, 77 kg of water, and 55 kg of cement mix. These quantities are based on the parts required in the mixture. Each ingredient's amount is derived from dividing the total weight by total parts, then multiplying accordingly.
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