Acomputer can perform c calculations in s seconds. how many minutes will it take the computer to perform k calculations?

a. 60ks/c
b. ks/c
c. ks/(60c)
d. 60c/(ks)
e. k/(60cs)

  C. ks/(60c)

Step-by-step explanation:

Units analysis is helpful here.

  A. (60 sec/min)(k calc)(s sec)/(c calc) = 60ks/c sec²/min ≠ min

  B. (k calc)(s sec)/(c calc) = ks/c sec ≠ min

  C. (k calc)(s sec)/((60 sec/min)(c calc)) = ks/(60c) min . . . correct units

  D. (60 sec/min)(c calc)/((k calc)(s sec)) = 60c/(ks) /min ≠ min

  E. (k calc)/((60 sec/min)(c calc)(s sec)) = k/(60cs) min/sec² ≠ min

The only choice in which the units work out correctly is choice C.

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