A metal bal cools from `64^(@)C` to `50^(@)C` in 10 minutes and to `42^(@)C` in next 10 minutes. The ratio of rates of fall of temperature during the two internal is

A metal ball cools from 64^(@)C to 50^(@)C in 10 minutes and to 42^(@)C in the next 10 minutes. The ratio of the rates of fall of temperature during the two intervals is

A metal ball cools from 64^(@)C to 50^(@)C in 10 minutes and to 42^(@)C in the next 10 minutes. The ratio of the rates of fall of temperature during the two intervals is

A body cools from 80^(@)C" to "70^(@)C in 5 minutes and to 62^(@)C in the next 5 minutes. The ratio of the rates of fall of temperature during the two intervals is

A metal sphere cools from 64 °C to 55 °C in 10 minutes and to 42 °C in the next 10 minutes. The ratio of fall of temperature of first 10 minutes to next ten minutes is

A body cools from 62^(@)C to 50^(@)C in 10 minutes and to 42^(@)C in the next 10 minutes. Find the temperature of surroundings.

Hot water cools from 60^(@)C to 50^(@)C in the first 10 minutes and to 42^(@)C in the next 10 minutes Then the temperature of the surrounding is

A body cools from 50^(@)C to 46^(@)C in 5 minutes and to 40^(@)C in the next 10 minutes. The surrounding temperature is :

Hot water cools from 60^(@)C to 50^(@)C in the first 10 minutes and to 45^(@)C in the next 10 minutes. The temperature of the surroundings is: