A mountain slope of total area $200$ km$^2$ is divided into three altitudinal vegetation zones. The zones occupy the following proportions of the slope length: grassland (0-500 m) 30 %, shrubland (500-1500 m) 50 %, and forest (1500 m) 20 %. Assuming the area is proportional to length, calculate the area of each vegetation type. Then, if a fire destroys 15 % of the shrubland area, what is the new total vegetated area and the overall percentage change from the original total?

Question

A mountain slope of total area $200$ km$^2$ is divided into three altitudinal vegetation zones. The zones occupy the following proportions of the slope length: grassland (0-500 m) 30 %, shrubland (500-1500 m) 50 %, and forest (>1500 m) 20 %. Assuming the area is proportional to length, calculate the area of each vegetation type. Then, if a fire destroys 15 % of the shrubland area, what is the new total vegetated area and the overall percentage change from the original total?

Accepted Answer

New total area = 185 km^2; overall reduction = 7.5%

Gce Model Questions Vol1 2024 Geography Question 34

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