SOLUTION: Adam finishes the first half of the exam in half as much time as he takes to finish the second half. if he finishes the entire exam in 2hours, how long (in min) did he take to fini

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Adam finishes the first half of the exam in half as much time as he takes to finish the second half. if he finishes the entire exam in 2hours, how long (in min) did he take to fini      Log On


   



Question 878316: Adam finishes the first half of the exam in half as much time as he takes to finish the second half. if he finishes the entire exam in 2hours, how long (in min) did he take to finish the first half?
A) 160
B) 140
C) 120
D) 40

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
note: how long (in min) did he take to finish the first half?
x%2F2+%2B+x+=+2hr
x + 2x = 4
3x = 4
x = 4/3, 1hr, 20min was the time for the 'second' half
the first half is x/2
80min/2 = 40min, for the first half.