Differentiate between large-scale maps and small-scale maps. 2. Jerry leaves Melbourne (Australia) for Durban (31°E) at 22H10 (Wednesday). The time in Durban when he leaves Melbourne is 14H34 (same day). The duration of the flight is 12 hours and 55 minutes. a. At what time and which day will he arrive in Durban? b. What will be the date and time in Melbourne when he arrives in Durban? c. Calculate the longitude for Melbourne. 3. The mean magnetic declination in 2005 was 9°,6 W. The mean annual change is 4 minutes westward. Calculate the magnetic declination in 2010.

Question

Asked on March 24, 2026Geography

This geography problem is solved step by step below, with detailed explanations to help you understand the method and arrive at the correct answer.

Accepted Answer · 2026-03-24T06:01:11.365Z

Step 1: Differentiate between large-scale maps and small-scale maps. • Large-scale maps show a small geographical area with a high level of detail. They have a larger representative fraction (e.g., 1:10,000). • Small-scale maps show a large geographical area with less detail. They have a smaller representative fraction (e.g., 1:1,000,000). Step 2: Calculate arrival time and longitude. a) At what time and which day will he arrive in Durban? Departure time in Durban: 14H34 (Wednesday) Flight duration: 12 hours 55 minutes Add the flight duration to the departure time in Durban: 14 H 34 M + 12 H 55 M = 26 H 89 M Convert 89 minutes to hours and minutes: 89 minutes = 1 hour 29 minutes Add this to the hours: 26 H + 1 H 29 M = 27 H 29 M Since a day has 24 hours, subtract 24 hours to find the time on the next day: 27 H 29 M - 24 H = 03 H 29 M The arrival will be on the next day. The arrival time in Durban is 03H29 (Thursday). b) What will be the date and time in Melbourne when he arrives in Durban? Departure time in Melbourne: 22H10 (Wednesday) Departure time in Durban: 14H34 (Wednesday) Calculate the time difference between Melbourne and Durban: 22 H 10 M - 14 H 34 M To subtract, borrow 1 hour (60 minutes) from 22 hours: 21 H 70 M - 14 H 34 M = 7 H 36 M Melbourne is 7 hours 36 minutes ahead of Durban. Arrival time in Durban: 03H29 (Thursday) Add the time difference to the arrival time in Durban to find the Melbourne time: 03 H 29 M + 7 H 36 M = 10 H 65 M Convert 65 minutes to hours and minutes: 65 minutes = 1 hour 5 minutes Add this to the hours: 10 H + 1 H 05 M = 11 H 05 M The arrival time in Melbourne is 11H05 (Thursday). c) Calculate the longitude for Melbourne. Time difference: 7 hours 36 minutes We know that 1 hour = 15^ longitude and 4 minutes = 1^ longitude. Convert the time difference to degrees: 7 hours × 15^/hour = 105^ 36 minutes / 4 minutes/^ = 9^ Total longitude difference: 105^ + 9^ = 114^ Durban's longitude is 31^ E. Since Melbourne is ahead in time, it is to the east of Durban. Longitude of Melbourne: 31^ E + 114^ = 145^ E The longitude for Melbourne is 145^ E . Step 3: Calculate the magnetic declination in 2010. Mean magnetic declination in 2005: 9^ 6' W Mean annual change: 4' westward Number of years from 2005 to 2010: 2010 - 2005 = 5 years Total change in declination: 5 years × 4'/year = 20' westward Since the initial declination is westward and the change is also westward, add the change to the initial declination: 9^ 6' W + 20' W = 9^ (6' + 20') W = 9^ 26' W The magnetic declination in 2010 is 9^ 26' W .

Accepted Answer · 2026-03-24T06:01:11.365Z

Step 1: Differentiate between large-scale maps and small-scale maps. • Large-scale maps show a small geographical area with a high level of detail. They have a larger representative fraction (e.g., 1:10,000). • Small-scale maps show a large geographical area with less detail. They have a smaller representative fraction (e.g., 1:1,000,000). Step 2: Calculate arrival time and longitude. a) At what time and which day will he arrive in Durban? Departure time in Durban: 14H34 (Wednesday) Flight duration: 12 hours 55 minutes Add the flight duration to the departure time in Durban: 14 H 34 M + 12 H 55 M = 26 H 89 M Convert 89 minutes to hours and minutes: 89 minutes = 1 hour 29 minutes Add this to the hours: 26 H + 1 H 29 M = 27 H 29 M Since a day has 24 hours, subtract 24 hours to find the time on the next day: 27 H 29 M - 24 H = 03 H 29 M The arrival will be on the next day. The arrival time in Durban is 03H29 (Thursday). b) What will be the date and time in Melbourne when he arrives in Durban? Departure time in Melbourne: 22H10 (Wednesday) Departure time in Durban: 14H34 (Wednesday) Calculate the time difference between Melbourne and Durban: 22 H 10 M - 14 H 34 M To subtract, borrow 1 hour (60 minutes) from 22 hours: 21 H 70 M - 14 H 34 M = 7 H 36 M Melbourne is 7 hours 36 minutes ahead of Durban. Arrival time in Durban: 03H29 (Thursday) Add the time difference to the arrival time in Durban to find the Melbourne time: 03 H 29 M + 7 H 36 M = 10 H 65 M Convert 65 minutes to hours and minutes: 65 minutes = 1 hour 5 minutes Add this to the hours: 10 H + 1 H 05 M = 11 H 05 M The arrival time in Melbourne is 11H05 (Thursday). c) Calculate the longitude for Melbourne. Time difference: 7 hours 36 minutes We know that 1 hour = 15^ longitude and 4 minutes = 1^ longitude. Convert the time difference to degrees: 7 hours × 15^/hour = 105^ 36 minutes / 4 minutes/^ = 9^ Total longitude difference: 105^ + 9^ = 114^ Durban's longitude is 31^ E. Since Melbourne is ahead in time, it is to the east of Durban. Longitude of Melbourne: 31^ E + 114^ = 145^ E The longitude for Melbourne is 145^ E . Step 3: Calculate the magnetic declination in 2010. Mean magnetic declination in 2005: 9^ 6' W Mean annual change: 4' westward Number of years from 2005 to 2010: 2010 - 2005 = 5 years Total change in declination: 5 years × 4'/year = 20' westward Since the initial declination is westward and the change is also westward, add the change to the initial declination: 9^ 6' W + 20' W = 9^ (6' + 20') W = 9^ 26' W The magnetic declination in 2010 is 9^ 26' W .

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