How coffe is a mug cools form `90^(@)C to 70^(@)C` in 4.8 minutes. The room temeprature is `20^(@)C.` Applying Newton's law of cooling the time needed to cool I further by `10^(@)C ` should be nealry-

A body cools from 100^(@)C to 70^(@)C in 8 minutes. If the room temperature is 15^(@)C and assuming newton's law of cooling holds good, then time required for the body to cool from 70^(@)C to 40^(@)C is

A body cools from 100^(@)C to 70^(@)C in 8 second. If the room temperature is 15^(@)C , and assuming that Newton's law of cooling holds good, then time required for the body to cool from 70^(@)C to 40^(@)C is

A body cools from 60^(@)C to 50^(@)C in 10 minutes . If the room temperature is 25^(@)C and assuming Newton's law of cooling to hold good, the temperature of the body at the end of the next 10 minutes will be

A body cools from 50^(@)C to 40^(@)C in 5 min. The surroundings temperature is 20^(@)C . In what further times (in minutes) will it cool to 30^(@)C ?

A body cools from 50^(@)C to 40^(@)C in 5 min. The surroundings temperature is 20^(@)C . In what further times (in minutes) will it cool to 30^(@)C ?

A body cools from 100^@C to 70^@C in 4 minute. If the room temperature is 15^@C the time taken to cool from 70^@C to 40^@C will be

A pan filled with hot food cools form 94^(@)C to 86^(@)C in 2 minutes . When the roo temperature is 20^(@)C . How long will it cool from 74^(@)C to 66^(@)C ?

A body cools from 70^(@)C to 60^(@)C in 8minute The same body cools from 60^(@)C to 50^(@)C in .