BECE Social Studies 2020 Paper

Concept:The Earth turns $360^{\circ}$ in 24 hours, so it turns $15^{\circ}$ of longitude every hour. Places to the east see the Sun first, so their time is ahead.Solution:Longitude difference $= 80^{\circ} - 20^{\circ} = 60^{\circ}$ (both east, so subtract).Time difference $= \dfrac{60^{\circ}}{15^{\circ}} = 4$ hours.Town B is further east, so its time is 4 hours ahead: 9:00 a.m. + 4 hours = 1:00 p.m.Key point: East is ahead (add time); west is behind (subtract time).Answer:Option A (1:00 p.m.)