On a cold january morning, the radiator fluid in kuri’s car is -15 f. with the engine running, the temperature rises by 2.5°f per minute. how long before the radiator temperature reaches 40°f?

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.

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