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Question

The percentage Fe and corresponding net value for an iron ore mine is given below

Fe (%)	Net value (INR per tonne)
58	4000
62	4500

Assuming net value versus grade curve to be a straight line, and mining cost of waste is INR 1000 /m³; the correct representation of stripping ratio, SR (m³/tonne) versus Fe (%) grade curve is

MCQ

$SR = -3.250 + 0.125 \times Fe$

$SR = 3.250 + 0.125 \times Fe$

$SR = 3250 + 125 \times Fe$

$SR = -3250 + 125 \times Fe$

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