Mrs Holland

Mrs. Holland wants to paint her garage wall.
The wall measures 6 m x 3 m
Each can of paint covers 5 m².
Each can cost £7.50
How much will it cost Mrs. Holland to paint her garage wall?

Correct answer:

x =  27

Step-by-step explanation:

$$\begin{gathered} a=6\text{m} \\ b=3\text{m} \\ {S}_1=5{\text{m}}^2 \\ {c}_1=7.50 \\ S=a\cdot b=6\cdot 3=18{\text{m}}^2 \\ n=S/S_1=18/5=\frac{18}{5}=3\frac{3}{5}=3.6 \\ x=c_1\cdot n=7.5\cdot 3.6=27 \end{gathered}$$

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