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2015-08-27T22:13:46+08:00

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The answer is 81 min. or 1 hour and 21 min.
because 4050 divided by 150 and the answer is 27
and 27 times 3 equals 81
therefore the answer is 81 minutes
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2015-08-28T18:30:42+08:00
  150 : 3 = 4050 : x
x = ( 3 · 4050 ) / 150
   = (3 · 27 )
   = 81
Therefore, Mariel can type 4050 words in 81 minutes or 1h and 21mins.


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