A clock with a brass pendulum keep correct time at 20^(@) C but loses 8.212 s per day when the temperature rises to30^(@) C. The coefficient of linear expansion of brass is

A clock with a brass pendulum keep correct time at 20^(@) C but loses

1.	A clock with a brass pendulum keep correct time at 20^(@) C but loses 8.212 s per day when the temperature rises to30^(@) C. The coefficient of linear expansion of brass is
Answer» `25 xx 10^(-6)//^(@)C ` `19 xx 10^(-6) //^(@) C ` `20 xx 10^(-6)//^(@)C ` `11 xx 10^(-6)//^(@) `C Answer :B