Solution

The correct answer is 51.2μs and 12.5μs 

Key PointsThe delay in Ethernet transmission, which is measured by the duration required to send a single frame over the physical medium, is determined by dividing the frame size by the speed of transmission. In this case, the transmission delay is:
           Transmission delay = Frame size / Transmission rate
                  => 512 bytes / 10 Mbps = 51.2 microseconds

In Ethernet, the propagation delay denotes the time duration for a single bit to traverse from source to destination over the physical network medium. It's assessed by dividing the medium's length by the transmission speed of the signal. In this case, the propagation delay is:
          Propagation delay = Length of medium / Propagation speed
                  => 2500 m/2 x 10^8 m/s 12.5 microseconds

Consequently, in a standard Ethernet setup featuring a transmission rate of 10 Mbps, a medium length of 2500 m, and a frame size of 512 bytes, the correspondingly calculated transmission delay and propagation delay are 51.2μs and 12.5μs, respectively.