Work Power and Energy - Online Test

Total Number of Questions in this Test: 10
Total Number of Questions Answered: 0
Total Number of Questions Skipped: 0


Time left:
 
Question : 1

Tea in a cup cools from 80 degree C to 60 degree C in first one minute, when the temperature of surroundings is 30 degree C. Time taken for cooling from 60 degree C to 50 degree C will be ---- sec.

Options :
  •  30
  •  60
  •  50
  •  70