Work with a partner. A train travels 50 miles every 40 minutes. To determine the number of miles the train travels in 90 minutes, your friend creates the
following table.

please help!!

The answer is 112.5 miles in 90 minutes
To create a table you can do
50:40
100:80
112.5:90
We can find the answers by multiplying the original ratio 50:40 by 2.25 we do this because 90 minutes is 2.25 times longer than 40 minutes.

The shelves will hold 270 books in total