.
Alliyah and Abigail together can type 90 words per minute. How fast can Abigail type 700 words if Aliyah can type 300 words in 4 minutes?
~~~~~~~~~~~
Together they type 90 words per minute.
Individually, Aliyah can type 300 words in 4 minutes, or 300/4 = 75 words per minute.
Hence, Abigail types 90-75 = 15 words per minute.
To type 700 words, Abigail needs
= 46
minutes, or 46 minutes and 40 seconds. ANSWER
Solved.