Question

A cooling machine starts cooling the room at the rate of 5degree Celsius per hour. If the temperature of the room is 28 degree Celsius,find the number of hours it takes to lower down the room temperature to -7 degree Celsius​

Answer 1

Answer:

5 hours

Step-by-step explanation:

cooling machine cools room at the rate of 5°C per hour.

the room temperature is 28°C .

required temperature -7°C .

so, 28 + 7 /5 = 5 hours

Answer 2

Step-by-step explanation:

answer must be 7 hours

28+7/5

35/5=7 hrs