Answer:
D, 10m x 20m
Explanation:
If the scale is 1cm in the diagram is 5m in real life, then:
In diagram:
Length of study area - 4cm
Breadth of study area - 2cm
In real life:
Length of student area - (4/1) x 5 = 20m
Breath of student area - (2/1) x 5 = 10m