Subject: General Aptitude · Chapter: Time and Work · Exam: · Marks: · Difficulty:
Computer A takes 3 minutes to process an input while computer B takes 5 minutes. If computers A, B and C can process an average of 14 inputs in one hour, how many minutes does computer C alone take to process one input? (M.C.A., 2009)
(a)4
(b)6
(c)10
(d)None of these
Answer
Answer (as printed): B
Explanation
Number of units processed by computer A in 1 min 1 = . 3 1 Number of units processed by computer B in 1 min = . 5 Number of units processed by A, B and C in 1 min 14 × 3 7 = = . 60 10 \ Number of units processed by computer C in 1 min 7 1 1 7 8 5 1 = – + = – = = . 10 3 5 10 15 30 6 Hence, computer C takes 6 minutes to process one input alone.
Explanation as extracted from the printed page; notation may be imperfect.