Question

A certain freezing process requires that room temperature be lowered from 40 deg celcius at the rate of 5 deg celcius every hour. what will be the room temperature 10 hours after the process begins?

0 deg celcius

10 deg celcius

- 10 deg celcius

- 20 deg celcius​

Answer 1

Answer:

Therefore, the room temperature 10 hours after the process begins is -10°C.

Step-by-step explanation:

Since there is a decrease in temperature by 5°C every hour, let's first find the total decrease in 10 hours:

or, 10 × 5 = 50°C.

This means that after 10 hours, there is going to be a decrease in temperature by 50°C.

Since 'decrease' refers to the subtraction operation, let's find the total decrease in temperature from the initial temperature of 40°C as:

or, 40 - 50 = -10°C.