Question

If 2 over 5 tons of concrete covers 5 over 6 of a wall, how many tons of concrete are required to cover the entire wall?

A. 12 over 25 ton
B. 3 over 5 ton
C. 1 and 7 over 30 tons
D 2 and 1 over 12 tons

Answer 1

A. 12.25 tons

Explanation:

We will let x represent the amount required to cover the entire wall.

We can divided 2/5 by 5/6 to solve for x

2/5 divided by 5/6=x

When you divide by a fraction, you can always multiply by the reciprocal (flipped number).

Our new equation is:

2/5·6/5=12/25