Question

Water boils at 100 \degree \text{C}100°C100, degree, C. This is 400\%400%400, percent more than my room's temperature. What is my room's temperature?

Answer 1

Answer: His room's temperature is 20°C.

Explanation:

Since we have given that

Temperature at which water boils = 100°C

According to question, it is 400% more than his room's temperature.

Let his room temperature would be 'x'.

So, our equation becomes,

`(100+400)/(100)* x=100\\\\(500)/(100)* x=100\\\\5x=100\\\\x=(100)/(5)\\\\x=20^\circ C`

Hence, his room's temperature is 20°C.

Answer 2

`20\°C`

Explanation:

Let

x------> my room's temperature

we know that

`400\%=(400)/(100)=4`

so

The equation that represent this situation is

`4x+x=100`

Solve for x

`5x=100`

`x=20\°C`