A builder needs 6.5 cubic metres of concrete for a job. This table shows the mixture for the concrete.
How many cubic metres of sand does the builder need?
cubic metres
cement is 2 parts
sand is 4 parts
small stones are 6 parts
water is 1 part
If the four parts sand means 4 cubic meters of sand per 13 cubic meters of concrete, you can you can multiply 4/13 by 6.5 to get 2 cubic meters of sand.
Let me know if I misinterpreted the question so that I can try to fix it. I hope this helps
