A man can route three-quarters of a kilometre against the stream in 11 1/4 minutes. The speed (in km/hr) of the man in still water is
(a) 2 (b) 3 (c) 4 (d) 5
There is something I don't understand about algebra: It has been around for thousands of years, yet no one has ever found out what the value of "x" or "y" really is.
Richard van der Merwe
"The study of mathematics, like the Nile, begins in minuteness but ends in magnificence"