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WAEC Geography 2018 Papers

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Question : 14

Total: 50

Use the climatic data to answer the question below
Month	Jan	Feb	Mar	Apr	May	June	July	Aug	Sept	Oct	Nov	Dec.
Temperature(°C)	26	26	26	26	26	27	27	28	28	28	27	27
Rainfall(mm)	35	50	104	139	195	228	248	243	245	250	91	55

What is the mean temperature from July to December?

16.5°C
17.2°C
27.5°C
28°C

Solution:

Concept:

The mean temperature over a set of months is the sum of monthly temperatures divided by the number of months.

Explanation:

From July to December, the temperatures are

27^\circ\mathrm{C}

,

28^\circ\mathrm{C}

,

28^\circ\mathrm{C}

,

28^\circ\mathrm{C}

,

27^\circ\mathrm{C}

, and

27^\circ\mathrm{C}

.

Add them:

27 + 28 + 28 + 28 + 27 + 27 = 165

.

There are 6 months.

Mean temperature

= \frac{165}{6} = 27.5^\circ\mathrm{C}

.

Answer:

C.

27.5^\circ\mathrm{C}

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