From 9.00 AM to 2.00 PM, the temperature rose at a constant rate from 21ºC to 36ºC. What was the temperature at noon ?

Explanation

Time difference between 9.00 A.M & 2.00 P.M = 5 hours Temperature difference between 21°C & 36°C = 36 – 21 = 15°C Now, Time difference between 9.00 A.M & 12.00 Noon = 3 hrs. temperature ¾¾¾¾¾¾® ° In 5 hours 15 C difference temperature æ ö 15 ¾¾¾¾¾¾® So, In 3 hours ø = 9°C ´ 3 ç ÷ è difference 5 So, temperature at noon = 21 + 9 = 30°C