Question

An AC cools the room at the rate of 4ס C per hour. If at the beginning the
temperature of the room is 30ס C, find the number of hours it takes to decrease the room temperature to - 2ס C.

Answer 1

Answer:

1hour 15 minutes

Step-by-step explanation:

30 -50= –20

50÷40

Answer 2

Answer:

(30°C+2 °C)/4°C = 8 Hours