VOLUNTEER TRAINING FOR DISADVANTAGED IN MATHS – QUESTION 2 : When copying a compact disc on a computer the dialogue box showed that the task was 60 % complete. If it had taken 12 minutes so far, how much longer will it take to complete the copying? (A) 6 mins, (B) 8 mins, (C) 12 mins, (D) 20 mins, (E) 40 mins.
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VOLUNTEER TRAINING FOR DISADVANTAGED IN MATHS – ANSWER 2 : B, where 60 % is 12 mins, 10 % is 12 / 6 = 2 mins then 100 % is 2 x 10 = 20 mins. Difference : 100 – 60 = 40 % or 4 x 2 = 8 mins.
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