Answer:
It takes 22 minutes by the radiator to reaches 40°F.
Step-by-step explanation:
Given the radiator fluid in Kuri’s car is -15 °F.
Thus, initial temperature of the radiator = - 15 °F
also, the temperature rises by 2.5°F per minute.
We have to find the time (in minutes) taken by the radiator to reaches 40°F.
Thus, final temperature of radiator = 40°F
Let it takes x minutes to reach 40°F from - 15 °F at a speed of 2.5°F per minute that is 2.5x.
Thus, Final temperature - inital temperature = 2.5x
⇒ 40 - (-15) = 2.5x
⇒ 40 + 15 = 2.5x
⇒ 55 = 2.5x
⇒ x = 22
Thus, it takes 22 minutes by the radiator to reaches 40°F.
