Question

A builder has mixed up cement and sand to create 100 kgs of mortar.In which there is cement 20 kgs and sand 80 kgs...whats the ratio/?? solve with full procedure

Answer 1

Step-by-step explanation:

• The paste, composed of portland cement and water, coats the surface of the fine (small) and coarse (larger) aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.

Answer 2

Answer:

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The union A ∪ B is the set of all elements belonging to A or to B. In mathematics, the word 'or' always means 'and/or', so all the elements that are in both sets are in the union. The sets A and B are called disjoint if they have no elements in common, that is, if A ∩ B = ∅.