Question 192411
A student finishes the first half of an exam in 2/3 the time it takes him to finish the second half. If the entire exam takes him an hour, how many minutes does he spend on the first of the exam?
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Let the time for the 2nd half be "x".
Then the 1st half takes (2/3)x
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Equation:
x + (2/3)x = 60 minutes
(5/3)x = 60
5x = 180
x = 36 minutes 
(2/3)x = (2/3)36 = 24 minutes (time spent on the 1st half of the exam)
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Cheers,
Stan H.