Mining Engineering
2025 · Paper 1
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Complete GATE MN 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 58–60 of 65. Imported answers require review unless explicitly marked reviewed.
Question 58
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The area bounded by the curves,
, and
is ___ (rounded off to 3 decimal places)Log in to check the answer
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Data from a borehole log with collar elevation at 590 mRL are given below. Composite grade is calculated using cores of 5 m above and below the reference bench at 580 mRL. The composite grade, in %, is ___ (rounded off to 1 decimal place)
Sequence of cores (top to bottom) | Core length (m) | Grade (%) |
|---|---|---|
1 | 3.0 | 40 |
2 | 3.0 | 42 |
3 | 2.0 | 41 |
4 | 3.0 | 43 |
5 | 2.0 | 42 |
6 | 3.0 | 41 |
7 | 3.0 | 44 |
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The information of a mining project for a life of three years is given below:
| Year 0 | Year 1 | Year 2 | Year 3 |
|---|---|---|---|---|
Revenue (Crore Rupees) | | 200 | 300 | 400 |
Capital cost (Crore Rupees) | 300 | | | |
Operating cost (Crore Rupees) | | 30 | 40 | 35 |
Applicable tax rate = 30 %
Discount rate = 10 %
If straight line depreciation with zero salvage value is applicable, the NPV, in Crore Rupees, is ____ (rounded off to 2 decimal places)
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