The time period of simple pendulum is T. When the length increases by 10 cm , its peirod is T_(1). When the length is decreased by 10 cm, its period is T_(2). Then the relation between T, T_(1) and T_(2) is

The time period of simple pendulum is T. When the length increases by

1.	The time period of simple pendulum is T. When the length increases by 10 cm , its peirod is T_(1). When the length is decreased by 10 cm, its period is T_(2). Then the relation between T, T_(1) and T_(2) is
Answer» `2/(T^(2))=1/(T_(1)^(2))+1/(T_(2)^(2))` `2/(T^(2))=1/(T_(1)^(2))-1/(T_(2)^(2))` `2T^(2)=T_(1)^(2)+T_(2)^(2)` `2T^(2)=T_(1)^(2)-T_(2)^(2)` ANSWER :C