(a) Explain any four ways in which lines of latitude differ from lines of longitudes (b) If the time at town A (long 75°W) is 5.00p.m on Friday, what will b...

Answer Details

(a) Four ways lines of latitude differ from lines of longitude:

(Also acceptable: the spacing between parallels is roughly constant, while meridians are farthest apart at the Equator; latitude determines climate/temperature zones, longitude determines local time.)

(b) Time calculation:

Town A is at long \(75^{\circ}\text{W}\), Town B at long \(120^{\circ}\text{E}\). They are on opposite sides of the Prime Meridian, so add the longitudes:

\[ \text{Longitude difference} = 75^{\circ} + 120^{\circ} = 195^{\circ} \]

The Earth turns \(15^{\circ}\) in \(1\) hour, i.e. \(1^{\circ} = 4\) minutes:

\[ \text{Time difference} = 195 \times 4 = 780\text{ minutes} = 13\text{ hours} \]

Town B is east of Town A, so its time is ahead. Add 13 hours to A's time:

\[ 5:00\text{ p.m. Friday} + 13\text{ hours} = 6:00\text{ a.m. Saturday} \]

Time at Town B = 6:00 a.m. on Saturday.