A computer can perform c calculations in s seconds. How many minutes will it take the computer to perform m calculations?  Answers:
A) 60ms/c B) ms/c C) ms/60c D) 60c/ms E) m/60cs
As 'thick' as this question might look, it's actually a fairly straight-forward Rate question and can be solved by TESTing VALUES.   We're told that a computer can perform C calculations in S seconds.   Let's TEST....   C = 2   S = 3   2 calculations every 3 seconds =   40 calculations every 1 minute   We're asked how many MINUTES it will take to perform K calculations.   Since we already know that the computer can perform 40 calculations in 1 minute, let's TEST...   m = 80   So we're looking for an answer that = 2 when C = 2, S = 3 and K = 80   Answer A: 60mS/C = 60(80)(3)/2 = 7200 This is NOT a match   Answer B: mS/C = (80)(3)/2 = 120 This is NOT a match   Answer C: mS/60C = (80)(3)/(60)(2) = 2 This IS a match   Answer D: 60C/mS = 60(2)/(80)(3) = 1/2 This is NOT a match   Answer E: m/60CS = 80/(60)(2)(3) = a fraction. This is NOT a match   ms/60c
<result>C</result>
A computer can perform c calculations in s seconds. How many minutes will it take the computer to perform m calculations?