A metal rod has a length of Im at 30^(@) C . 'alpha'of metal is 2.5 xx 10^(-5)//^(@) C. The temperature at which it will be shortened by 1mm is

A metal rod has a length of Im at 30^(@) C . 'alpha'of metal is 2.5 xx

1.	A metal rod has a length of Im at 30^(@) C . 'alpha'of metal is 2.5 xx 10^(-5)//^(@) C. The temperature at which it will be shortened by 1mm is
Answer» `-30^(@) C ` `-40^(@)` C `-10^(@)`C `10^(2)C` Answer :C