MANETs are capable of forming wireless network that can setup a transmission range between the nodes in the network. In this paper, the authors propose an efficient power and rate control scheme MAC layer. Also in this approach the best path will be selected by considering the residual energy of node. Here they extend the process of selecting the path by also considering the path's residual energy of the node. This residual energy is estimated at both the situations when the node receives data packets and transmits the data packets. Also they have proposed a method where each node updates a table. This table includes energy efficiency in all combinations of transmission power and rate.