An iron wire and copper wire having same length and cross-section are suspended from same roof Young.s modulus of copper is 1/3rd that of iron. Then the ratio of the weights to be added at their ends so that their ends are at the same level is

An iron wire and copper wire having same length and cross-section are

1.	An iron wire and copper wire having same length and cross-section are suspended from same roof Young.s modulus of copper is 1/3rd that of iron. Then the ratio of the weights to be added at their ends so that their ends are at the same level is
Answer» `1:3` `1:9` `3:1` `9:1` ANSWER :3