Question

you need 2 3/4 wheelbarrows of sand to make 8 wheelbarrows of concrete. how much sand will you need to make 248 cubic feet of concrete

A. 84 cubic feet
B. 85 1/4 cubic feet
C. 682 cubic feet
D. Not enough info

Answer 1

8 ÷ (2 3/4) = 32/11

248 ÷ (32/11) = B. 85 1/4 cubic feet

Answer 2

Answer:

Option B.

Step-by-step explanation:

We need $2\frac{3}{4}$ wheelbarrows of sand for 8 wheelbarrows of concrete.

That means ratio between sand and concrete is $2\frac{3}{4}:8$

Or $\frac{11}{4}:8$

Now we have to calculate the amount of sand to make 248 cubic feet of concrete.

If the amount of sand required is x cubic feet then the ratio of sand and concrete will be x : 248.

Since both the ratios should be same therefore,

$\frac{x}{248}=\frac{\frac{11}{4} }{8}$

$\frac{x}{248}=\frac{11}{32}$

x = $\frac{11\times 248}{32}$

x = $\frac{2728}{32}$

x = $\frac{341}{4}$

  = $85\frac{1}{4}$ cubic feet

Option B will be the answer.