100ml of water at 20^@C and 100ml of water at 40^@C are mixed in calorimeter until constant temperature reached. Now temperature of the mixture is 28^@C. Water equivalent of calorimeter is

100ml of water at 20^@C and 100ml of water at 40^@C are mixed in calor

1.	100ml of water at 20^@C and 100ml of water at 40^@C are mixed in calorimeter until constant temperature reached. Now temperature of the mixture is 28^@C. Water equivalent of calorimeter is
Answer» <html><body><p>50J<br/>104.5J<br/>` -24.2J`<br/>209J</p>Answer :D</body></html>