On a map, 1cm represent 5km. Find the area on the map that represents 100km².
Correct Answer: Option B
On a map, 1cm represents 5km. Then it follows that 1cm² represents 25km². Acm² represents 100km². By apparent cross-multiplication, 1cm2 x 100km2 = Acm²x 25km²
therefore A = 100/25 = 4cm²