Neco Model Questions Vol1 2018 Geography Question 48

Practice objective / multiple choice question 48 from the 2018 Neco Model Questions Vol1 Geography examination.

Neco Model Questions Vol1 2018 Geography Objective / Multiple Choice Hard Difficulty
Question 48 NECO_MODEL_QUESTIONS_VOL1 • 2018 • GEOGRAPHY • objective

An earthquake of magnitude \(M = 6.5\) occurs 120 km from a town. The peak ground acceleration (PGA) in g can be estimated by \( \text{PGA} = \frac{0.5 \times 10^{(M-6)}}{\sqrt{R}} \), where \(R\) is the distance in kilometres.\n\nThe building‑damage threshold is \(0.2\ \text{g}\). Retrofitting costs are ₦150 000 for each 0.1 g of PGA above the threshold.\n\nCalculate the PGA for the town and state whether retrofitting is required. If retrofitting were needed, compute the cost.

Answer Options

Correct Answer A. PGA ≈ 0.144 g, which is below the 0.2 g damage threshold; therefore no retrofitting is required.
B. PGA ≈ 0.256 g, which exceeds the 0.2 g damage threshold; therefore retrofitting is required.
C. PGA ≈ 0.180 g, which is below the 0.2 g damage threshold; therefore no retrofitting is required.
D. PGA ≈ 0.144 g, which exceeds the 0.2 g damage threshold; therefore retrofitting is required.
Correct Answer
A
Correct Option:
PGA ≈ 0.144 g, which is below the 0.2 g damage threshold; therefore no retrofitting is required.

About This Question

This is Neco Model Questions Vol1 2018 Geography Question 48. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Geography examination.

Difficulty level: Hard .

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