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:

$20\°C$

Step-by-step explanation:

Let

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

we know that

$400\%=\frac{400}{100}=4$

so

The equation that represent this situation is

$4x+x=100$

Solve for x

$5x=100$

$x=20\°C$

Answer 2

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

Step-by-step 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,

$\dfrac{100+400}{100}\times x=100\\\\\dfrac{500}{100}\times x=100\\\\5x=100\\\\x=\dfrac{100}{5}\\\\x=20^\circ C$

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