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A cold store is at 10 °C below zero and warms by 4 °C every hour. What is its temperature after 5 hours?

A6 °C
B10 °C
C14 °C
D2 °C
Answer & Solution
Correct answer: B. 10 °C
It warms 5 x 4 = 20 degrees, so from 10 below zero it reaches 10 °C above zero.
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