Answer:

Scientist ne kaha hai ki har ek ghante mein room ka temperature 10% gir raha hai. Iska matlab, agar shuruwat mein room ka temperature \( T_0 \) hai, toh har ghante ke baad woh 90% ho jayega.

Temperature after 1 hour: \( T_1 = 0.90 \times T_0 \)

Temperature after 2 hours: \( T_2 = 0.90 \times T_1 = 0.90 \times 0.90 \times T_0 \)

Temperature after 3 hours: \( T_3 = 0.90 \times T_2 = 0.90 \times 0.90 \times 0.90 \times T_0 \)

Ab humein shuruwat temperature \( T_0 \) diya gaya hai, jo ki 30 degrees Celsius hai. Isko hum calculations mein substitute karte hain:

\[ T_3 = 0.90 \times 0.90 \times 0.90 \times 30 \]

\[ T_3 = 0.729 \times 30 \]

\[ T_3 = 21.87 \]

Isliye, 3 ghante baad room ka temperature lagbhag 21.87 degrees Celsius hoga.

Explanation:

Verified answer

Answer:

Starting room temperature: 30°C

10 % fall = 30-30*10/100 = 27

In 3 hours = 30-27*3 = -51