Painters

Six of the painters paint 90 m of the fence in five hours.
For how long would the four painters paint a 45-meter fence?
How many meters of the fence were painted by painters 5 for two hours?

Correct answer:

a =  3.75 d
b =  30 m

Step-by-step explanation:

$$\begin{gathered} x=90/6/5=3 \\ a=45/(4\cdot x)=45/(4\cdot 3)=\frac{15}{4}\text{d}=3.75\text{d} \end{gathered}$$

$b=x\cdot 5\cdot 2=3\cdot 5\cdot 2=30\text{m}$

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