Concrete is made from sand and cement. 20kg of concrete containe 15kg of sand. Find the ratio of sand to cement in its simplest form

Answer 1

To find the ratio of sand to cement, we divide the weight of sand by the weight of cement.

15kg sand / (20kg - 15kg) cement = 15kg sand / 5kg cement = 3 sand / 1 cement

The ratio of sand to cement is 3:1.