Imagine that you have trained your St. Bernard, Bernie, to carry a box of three 8-mm tapes instead of a flask of brandy. (When your disk fills up, you consider that an emergency.) These tapes each contain 7 gigabytes. The dog can travel to your side, wherever you may be, at 18 km/hour. For what range of distances does Bernie have a higher data rate than a transmission line whose data rate (excluding overhead) is 150 Mbps? How does your answer change if (i) Bernie’s speed is doubled; (ii) each tape capacity is doubled; (iii) the data rate of the transmission line is doubled.
I understand this type of problems very well. But here I am confused because I don't know how to relate the dog to me. I mean that I know I am the owner of the dog but what is the relationship between me and him when he carries 8-mm tapes? To answer (i), (ii), and (iii), I have first to answer the main problem. It has given me speed and asking me to find the distances, but the time is also missing. I have two unknowns.
I understand this type of problems very well. But here I am confused because I don't know how to relate the dog to me. I mean that I know I am the owner of the dog but what is the relationship between me and him when he carries 8-mm tapes? To answer (i), (ii), and (iii), I have first to answer the main problem. It has given me speed and asking me to find the distances, but the time is also missing. I have two unknowns.