Question 6

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waecmaths question: 

On a map, 1cm represent 5 km. Find the area on the map that represents 100km2 

Option A: 

2cm2

Option B: 

4 cm2

Option C: 

8cm2

Option D: 

16cm2

waecmaths solution: 

$\begin{align}  & 1cm\to 5km \\ & 1c{{m}^{2}}\to 5km\times 5km=25k{{m}^{2}} \\ & 100k{{m}^{2}}\to \frac{1c{{m}^{2}}\times 100k{{m}^{2}}}{25k{{m}^{2}}}=4c{{m}^{2}} \\\end{align}$ 

maths year: