Question

If 2 over 7 of a ton of concrete covers 7 over 8 of a wall, how many tons of concrete are required to cover the entire wall?

a. 1/4 ton
b. 16/49 ton
c. 5/7 ton
d. 65/56 tons

Answer 1

The answer is b) 16/49 ton

Explanation:

How? well The proportion is

2/7 over 7/8 = x/1

7/8 x 2/7 = x

16/49 = x

So b) 16/49 is the answer

Answer 2

2/7 of a ton of concrete - 7/8 of a wall
x of a ton of concrete - 1 of a wall (the entire wall)

The proportion:

`((2)/(7))/((7)/(8))=(x)/(1) \\ (2)/(7) * (8)/(7) = x \\ (16)/(49)=x`

The answer is b. 16/49 ton.