The breaking stress of wire is 7.2?10^8 N/m? and density is 7.8?10? kg/m?. The wire is held vertically to the rigid support. The maximum length so that the wire does not break is 9.4?10? m. Solve and explain.

Dear Student , Your question appears to be incomplete and unclear as the power on values are not clear as they're changed into " ? " , Hence I would like to request you to repost the question in a appropriate format so that we can provide you some meaningful help. Looking forward to hear from you again. Regards!