Question

On a given morning the temperature was 71°F. The temperature dropped 5°F and then rose 8°F. How much does the temperature need to rise or fall to return to the initial temperature of 71°F?
A) Fall 8°F
B) Fall 3°F
C) Rise 8°F
D) Rise 5°F

Answer 1

T=71
dropped 5
T1 = 71-5 = 66
rose 8
T2 = 66+8 = 74
required T=71
so, T= T2+ X
71 = 74 + X
X= (71-74) = -3 (-ve means fall in temperature)
so, fall 3F

Answer 2

Answer: The answer is B)Fall 3 F