waec model questions vol1 2020 geography | Practical

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Question 1 View Details
A topographic map of a hilly region is described as follows: the map scale is 1 cm = 500 m and the contour interval is 20 m. Three villages A, B and C appear on the map. The measured map distance from A to B is 5.6 cm with a bearing of N 30° E. The measured map distance from B to C is 3.2 cm with a bearing of S 45° E. Elevations obtained from the contour lines are 120 m at A, 180 m at B and 260 m at C. A river runs from point D (elevation 300 m) to point E (elevation 100 m) along a straight line on the map measured 7.5 cm with a bearing of S 20° W. Using this information answer the questions that follow.
Question Parts
(a)
Calculate the real ground distance between villages A and B in kilometres.
(b)
Determine the gradient (slope) between A and B as a percentage.
(c)
Using the given bearings, compute the straight‑line bearing from A to C. Give the bearing in the standard form N θ° E or S θ° E as appropriate (nearest degree).
(d)
Estimate the length of the river on the ground in kilometres and its average gradient as a percentage.
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Question 2 View Details
A rectangular school playground has real dimensions 120 m (length) by 80 m (width). You are required to draw a scaled plan on graph paper using the scale 1 cm : 4 m. After drawing, you measure the rectangle on the paper and find it to be 30 cm long and 20 cm wide. The playground is to be surrounded by a uniform 5 m wide concrete track. The cost of paving concrete is ₦1 500 per square metre.
Question Parts
(a)
Verify that the drawing conforms to the required scale of 1 cm : 4 m.
(b)
Calculate the real area (in m²) and perimeter (in m) of the playground.
(c)
Determine the real area occupied by the 5 m wide track that surrounds the playground.
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Question 3 View Details
A world map (scale 1 cm : 200 km) showing latitude and longitude lines is provided.
Question Parts
(a)
The city of Lagos is located at 6°30' N, 3°25' E. Express its latitude and longitude in decimal degrees.
(b)
Using the map, the city of Accra is marked at 5°35' N, 0°12' W. Determine the north‑south distance between Lagos and Accra, assuming 1° latitude ≈ 111 km. Show all steps.
(c)
On the map, the straight‑line distance between Lagos and Accra measures 4.8 cm. Using the map scale, calculate the actual ground distance in kilometres. Compare this distance with the north‑south distance obtained in part (b) and give a brief explanation for any difference.
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Question 4 View Details
The following observations were recorded at the University of Ibadan weather station over a 7‑day period:
Question Parts
(a)
Calculate the mean (average) of the daily maximum temperatures and the mean of the daily minimum temperatures for the week.
(b)
Identify the prevailing wind direction for the week. If there is a tie, state all directions that occur most frequently.
(c)
Calculate the total rainfall for the week. Then, using the average wind speed (mean of the seven wind speeds), determine the Beaufort scale number and give the corresponding description (use the simplified table: 0‑1 km/h = 0 (Calm), 2‑5 = 1 (Light air), 6‑11 = 2 (Light breeze), 12‑19 = 3 (Gentle breeze), 20‑28 = 4 (Moderate breeze), 29‑38 = 5 (Fresh breeze)).
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