i got a reference in a page " (512 x 512) pixels x 24 bits per pixel = 6 million bits ....
Transmission time over 64 kbps ISDN = 100 seconds "

question 1 : how can i calculate the transmission time??? is there any formula???

question 2 : if it is 100mbps LAN then how to calculate transmission time??

can you give links where i find the formula to calculate transmission time for LAN and ISDN??