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JAMB Geography 2018 Paper

Question : 37

Total: 70

If the time in New York (75°W) is 5.00pm, The time in Nigeria(15°E) will be

Solution:

Concept:

Time changes by 1 hour for every 15° of longitude. Locations to the east are ahead in time.

Explanation:

New York is at

75^\circ\text{W}

and Nigeria is at

15^\circ\text{E}

Total longitude difference

= 75^\circ + 15^\circ = 90^\circ

Since every

15^\circ

equals 1 hour, time difference

= \frac{90^\circ}{15^\circ} = 6

hours.

Nigeria lies east of New York, so Nigeria is ahead by 6 hours.

Time in Nigeria

= 5:00\text{ pm} + 6\text{ hours} = 11:00\text{ pm}

Answer:

11.00 pm.

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