SOLUTION: Jamill walks a distance that is 1/4 more than Jacob. Jacob uses 1/10 more time than Jamill. What is the ratio of the speeds of Jamill and Jacob?

Let Jamill's distance be d and Jamill's time be t.


Let Jacob's distance be x  and Jacob's time be y.



Then  d = x + x/4 = ,  and  y = .


It implies  x = .


Then Jamill's speed is  ,  while the Jacob' speed is   =  =  = .


Therefore, the ratio of the Jamill' speed to that of Jacob is   = .    ANSWER