Waec Model Questions Vol1 2021 Geography Question 50

Practice objective / multiple choice question 50 from the 2021 Waec Model Questions Vol1 Geography examination.

Waec Model Questions Vol1 2021 Geography Objective / Multiple Choice Hard Difficulty
Question 50 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • GEOGRAPHY • objective

A volcano erupts, producing an ash cloud that settles in a circular area with a radius of 20 km. The ash thickness decreases linearly from 10 cm at the crater centre to zero at the edge of the circle. The population density within the affected area is 150 persons km⁻². (a) Estimate the total volume of ash deposited (in cubic metres).\ (b) Estimate the number of people potentially affected.\ (c) Recommend the most urgent mitigation measure for the authorities.

Answer Options

Correct Answer A. Approximately $6.3\times10^{7}$ m³ of ash; about $1.9\times10^{5}$ people; immediate evacuation of the area.
B. Approximately $5.0\times10^{7}$ m³ of ash; about $2.5\times10^{5}$ people; distribution of masks to residents.
C. Approximately $6.3\times10^{6}$ m³ of ash; about $1.9\times10^{4}$ people; implementation of air‑quality monitoring stations.
D. Approximately $7.8\times10^{7}$ m³ of ash; about $1.2\times10^{5}$ people; construction of temporary barriers around the ash zone.
Correct Answer
A
Correct Option:
Approximately $6.3\times10^{7}$ m³ of ash; about $1.9\times10^{5}$ people; immediate evacuation of the area.

About This Question

This is Waec Model Questions Vol1 2021 Geography Question 50. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Geography examination.

Difficulty level: Hard .

View More Waec Model Questions Vol1 2021 Geography Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support