Answer:
18 shovels of sand
Step-by-step explanation:
We know
A builder mixes cement with sand using a 1:6 ratio.
This means for every 1 shovel of cement, he needs 6 shovels of sand.
He uses 3 shovels of cement.
How many shovels of sand does he need?
We take
3 x 6 = 18 shovels of sand
So, the builder needs 18 shovels of sand.