At 3 A.M. the temperature was 13º below zero.By noon, it had risen to 32.What was the average hourly increase in temperature?

1. At 3 A.M. the temperature was 13º below zero.By noon, it had risen to 32.What was the average hourly increase in temperature?

[BKB Senior Officer-2012 : 2012]

1. (19/9)º

2. (19/6)º

3. 5º

4. 7.5º

Answer

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