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

A. 2cm²
B. 4cm²
C. 8cm²
D. 8cm²

Correct Answer: Option B

D. 8cm²

Explanation

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