For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are:

• 70 litres of sand and 120 litres of aggregates
• 70 kg of sand and 140 litres of aggregates
• 105 litres of sand and 140 litres of aggregates
• 105 litres of sand and 210 litres of aggregates
• none of these.