Photo AI
Study the information below - NSC Geography - Question 3 - 2022 - Paper 1
Question 3
Study the information below. The orthophoto index map sheet west of 2930 CA 5 is … ``` 2930 AC 24 2930 AC 26 2930 AD 21 2930 CA 4 2930 CA 5 2930 CB 1 2930 CA ... show full transcript
Worked Solution & Example Answer:Study the information below - NSC Geography - Question 3 - 2022 - Paper 1
Step 1
Step 2
3.1.3 Calculate the straight-line distance in metres (m) that the power line covers from 6 in block B3 to 7 in block C5.
Answer
To calculate the straight-line distance:
Actual Distance = Map distance × Map scale
Assuming the map distance between point 6 and point 7 is 9 cm,
Actual Distance = 9 cm × 100 = 900 m
Thus, the power line covers a distance of 900 m.
Step 3
3.1.4 Draw a freehand cross-section from the recreation facility at point F in block D2 to point G in block D3. Indicate F and G on your cross-section.
Answer
In this step, a freehand drawing of the cross-section should be provided, ensuring to clearly label points F and G appropriately on the diagram.
Step 4
Step 5
3.1.6 Calculate the magnetic declination for 2022.
Answer
The total change in magnetic declination over 6 years can be calculated as follows:
Change = annual change × number of years = 9° × 6 = 54°
If we start with an initial declination of 24° 42', then for 2022:
Magnetic declination = initial declination + total change = 24° 42' + 54° = 24° 96'
Or in other terms: 25° 36' west of true north.