A pendulum beating seconds at one place (g=985cm//sec^(2)) is taken ot another place (g=981cm //sec^(2)). If it is to beat seconds at another place, its length is to decreases by

A pendulum beating seconds at one place (g=985cm//sec^(2)) is taken ot

1.	A pendulum beating seconds at one place (g=985cm//sec^(2)) is taken ot another place (g=981cm //sec^(2)). If it is to beat seconds at another place, its length is to decreases by
Answer» `0.1cm` `0.2cm` `0.4cm` `0.5cm` ANSWER :C