Question

A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C every hour. What will be the room temperature 6 hours after the process begins?​

Answer 1

Rate = 5° C

So, after 6 hours temperature= 5× 6 ⁰ = 30 °

So, 40°-30⁰= 10°

Answer 2

Answer:

Step-by-step explanation:

Room temperature right now: 40°C

The Rate it is lowering: 5°C every hour

∴ Room temperature after 6 hours = 5°C × 6 hours + 40°C

                                                          = 5 × 6 + 40

                                                          = 30 + 40

                                                          = 70°C

∴ After 6 hours the temperature will be 70°C

Detailed Explanation:

The room temperature now is 40°C and it increases at the rate of 5°C every hour so after 6 hours what will be the temperature?

So here we need to multiply 5°C with 6. We know that in one hour the temperature increases by 5°C so after 6 hours it will increase by 5°C multiplied by 6 hours which equals to 30. Then we need to add it to the 40°C temperature which is already there so that we get the temperature after 6 hours.