Question

A robotic vacuum cleaner can clean 150 m² in 2 h.Complete the rate table.Area (m²) 150 Time (h)24510

Answer 1

We already know that the robotic vacuum cleaner can clean 150m² in 2h, it means that in 4 hours the robot would have clean 300m², we can find how much the robot can clean in one hour, if in 2 hours the robot clean 150m², in one hour it will clean half of it, then

$\begin{gathered} 150\rightarrow2\text{ hours} \\ \\ 75\operatorname{\rightarrow}1\text{ hour} \end{gathered}$

Each hour the robot clean 75m². Therefore for each hour passed we will add 75m². If we want to evaluate the area after "h" hour, just do

$A=75h$

Putting the values of the table we have

$\begin{gathered} A=75\times4=300\text{ \lparen4 hours\rparen} \\ \\ A=75\times5=375\left(5\text{ hours\rparen}\right? \\ \\ A=75\times10=750\text{ }\lparen10\text{ hours\rparen} \end{gathered}$

Now we have all values to put on the table!