WAEC Physics 2018 Objective — Question 18

Question 18 of 50 from the West African Examinations Council (WAEC) Physics 2018 Objective paper, with the correct answer and a full explanation.

The diagram illustrates the mercury-in-glass thermometer used for determining the temperature of a room. Use the data on it to determine the room temperature

A. 3.3°C
B. 7.00°C
C. 13.00°C
D. 30.00°CCorrect

Explanation

The 3cm mark corresponds proportionally to (3/10)×100°C = 30°C on the 0–100°C, 10cm scale.

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