Find the distance along a circle of latitude then A(55°N, 35°E) and B(55°N, 70°E) on the earth's surface in:

Sawa Pretty, wacha tuendelee na swali la 8.

Tutatumia radius ya Dunia $R = 6370$ km na kwamba 1 nautical mile (nm) $= 1.852$ km.

8) Tafuta umbali kando ya duara la latitudo kati ya pointi A($55^\circ N, 35^\circ E$) na B($55^\circ N, 70^\circ E$) kwenye uso wa Dunia.

Pointi zote mbili ziko kwenye latitudo moja ($\alpha = 55^\circ N$). Tofauti ya longitudo ($\theta$) itakuwa:

$$\theta = 70^\circ - 35^\circ = 35^\circ$$

Fomula ya umbali kando ya latitudo ni:

$$D = \frac{\theta}{360^\circ} \times 2\pi R \cos \alpha$$