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Xanthia can read 100 pages per hour and Molly can read 50 pages per hour. If they each read the same book, and the book has 225 pages, how many more minutes than Xanthia would it take for Molly to finish reading the book?

 Jan 27, 2021
 #1
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225 p / 50 p/hr    -   225 p / 100 p/hr      *   60 m/hr = ............ minutes 

 Jan 27, 2021
 #2
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X   takes     225/100  = 2.25  hrs =   2 + 1/4  hrs =   2 hrs 15 min to read the book

 

M takes    225/50   =  4.5  hrs  =  4  hrs 30 mi  to read the  book

 

M  takes   2hr 15 min more   =   2(60) + 15   =   135 min   more

 

We actually may have guessed this....since M  reads 1/2 as fast as X, she takes twice as  long  !!!!

 

cool cool cool

 Jan 27, 2021

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