Question

CAR WASH, The B-Clean Car Wash washed 128 cars in 3 hours. At that rate, how many cars can they wash in 8 hours?

Short answer

341 cars are washed in 8 hours.

Step-by-step solution

Step 1. Consider the number of cars to be (n) that can be washed.

Assume that the number of cars that can be washed in 8 hours is n.

Step 2. By method of proportion.

The proportion can be written as:

$$\begin{gathered} \frac{128}{3}=\frac{n}{8} \\ 3\left(n\right)=8\left(128\right) \\ 3n=1024 \\ \frac{3n}{3}=\frac{1024}{3} \\ n=341.33 \\ n\approx 341\text{cars} \end{gathered}$$

Step 3. The conclusion from the number of cars to be washed.

The number of cars that can be washed in 8 hours are $n\approx 341\text{cars}$.