neco 2025 geography | Practical

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Question 1 View Details
A topographic map of the area around River A is provided. The map scale is 1 cm : 250 m. The map uses a square grid where each grid square measures 1 cm by 1 cm. The following information is given: - Town X is located at grid reference (3 cm, 4 cm) from the origin. - Village Y is located at grid reference (9 cm, 10 cm) from the origin. - The bearing from X to Y is measured as 45°. - The contour interval on the map is 20 m. - Elevation at X is 120 m and elevation at Y is 320 m. Using the information above, answer the following:
Question Parts
(a)
Calculate the straight‑line distance between Town X and Village Y in kilometres.
(b)
Determine the gradient (percentage) of the slope between X and Y.
(c)
A road is to be constructed along the straight line XY. The maximum allowable gradient for the road is 8%. State whether the road is feasible. If it is not feasible, suggest a point Z that lies midway on XY and calculate the cut (or fill) depth required at Z to achieve the permissible gradient.
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Question 2 View Details
A model of a rectangular agricultural field is drawn on a sheet of paper. The model uses a scale of 1 cm : 20 m. The rectangle on the model measures 12 cm in length and 8 cm in width. The field will be cultivated with maize at a seeding rate of 25,000 seeds per hectare. One kilogram of maize seed contains 2.5 million seeds. The price of the seed is ₦150 per kilogram. Fertiliser will be applied at a rate of 150 kg per hectare and costs ₦45 per kilogram.
Question Parts
(a)
Determine the actual length, width (in metres) and the area of the field (in hectares).
(b)
Calculate the total number of maize seeds required for the whole field.
(c)
Determine the mass of seed required (in kilograms) and the total cost of the seed.
(d)
If fertiliser is applied at 150 kg per hectare, calculate the total amount of fertiliser required and its cost.
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Question 3 View Details
A topographic map of a region is drawn at a scale of 1 cm = 2 km. The map shows latitude lines spaced at 1 minute of latitude and longitude lines spaced at 1 minute of longitude. Town A is located at the intersection of the 5°30' N latitude line and the 7°45' E longitude line. Town B is located at the intersection of the 5°45' N latitude line and the 8°10' E longitude line. At a latitude of about 5°N, one minute of latitude corresponds to 1.85 km and one minute of longitude corresponds to 1.84 km. Using the information provided, answer the following:
Question Parts
(a)
State the difference in latitude (in minutes) and the difference in longitude (in minutes) between Town A and Town B.
(b)
Calculate the straight‑line distance between the two towns in kilometres. Show all steps of your calculation.
(c)
Suggest one possible source of error that could affect the distance you have obtained and briefly explain how it would influence the result.
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Question 4 View Details
The weather station at Umuahia recorded the following data over five consecutive days: | Day | Max Temp (°C) | Min Temp (°C) | Relative Humidity (%) | Wind Speed (km/h) | |-----|---------------|---------------|-----------------------|-------------------| | 1 | 32 | 22 | 70 | 12 | | 2 | 35 | 24 | 80 | 8 | | 3 | 30 | 20 | 60 | 15 | | 4 | 33 | 23 | 75 | 10 | | 5 | 31 | 21 | 65 | 5 | The heat‑index (HI) for a day can be approximated by the formula: HI = T + 0.33 × RH – 0.70 × V – 4.00 where T is the mean daily temperature (°C), RH is the relative humidity (%), and V is the wind speed (km/h). Using the data above, answer the following:
Question Parts
(a)
Calculate the mean daily temperature for each of the five days.
(b)
Using the heat‑index formula provided, compute the heat‑index for each day and identify the day on which the heat‑index is highest.
(c)
Explain briefly why wind speed is included in the heat‑index calculation and how it affects the perceived temperature.
(d)
Suggest one precaution that residents should take on the day with the highest heat‑index.
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