BECE Social Studies 2023 Paper

Concept:The Earth turns $360^{\circ}$ in 24 hours, so time changes by 4 minutes for every $1^{\circ}$ of longitude ($1$ hour for every $15^{\circ}$). Places to the east are ahead in time.Solution:Both towns are east of Greenwich, so subtract:Difference in longitude $= 80^{\circ} - 20^{\circ} = 60^{\circ}$Time difference $= 60 \times 4 = 240$ minutes $= 4$ hoursTown $B$ is further east, so its time is ahead of town $A$:$9{:}00$ a.m. $+ 4$ hours $= 1{:}00$ p.m.Answer:Option A (1:00 p.m)