Mathematics
WAEC 2006
The temperature in a chemical plant was -5
oC at 2.00 am. The temperature fell by 6
oC and then rose again by 7
oC. What was the final temperature?
-
A.
-6oC
-
B.
-4oC
-
C.
4oC
-
D.
8oC
Correct Answer: Option B
Explanation
Temperature = -5oC
It fell by 6oC = -5oC - 6oC
= -11oC
Then rose by 7oC = -11 + 7
= -4oC (final temperature)
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