The ratio of speed of man in still water to the speed of the current is:

Jun 2019
445
237
USA
My question is related to time & distance. Not about variables like we see in algebra.
Time and distance are variables.

Algebra is the set of rules and techniques we use for solving complex problems like this. It doesn't matter if you're using "s" and "c" or "relative speed" and "current speed." It's still algebra.