JAMB Geography 2020 Paper

Concept:A map scale written as $1:X$ means that one unit on the map represents $X$ units on the ground.The larger the denominator $X$, the smaller the scale; the smaller the denominator, the larger the scale.Explanation:Ascending order means arranging from the smallest scale to the largest scale.This is done by comparing their denominators.The denominators are: $300,000$, $200,000$, $50,000$, and $200$.Since a larger denominator gives a smaller scale, order the denominators from largest to smallest:$300,000 > 200,000 > 50,000 > 200$.Therefore, the corresponding scales become:$1:300,000 < 1:200,000 < 1:50,000 < 1:200$.Answer:The ascending order is $1:300,000$, $1:200,000$, $1:50,000$, $1:200$.Hence, the correct option is B.