jamie can paint a wall in 54 minutes. together, connie and jamie can paint the same wall in 36 minutes. how…

jamie can paint a wall in 54 minutes. together, connie and jamie can paint the same wall in 36 minutes. how long would it take connie to paint the same wall by herself?\na. 18 minutes\nb. 45 minutes\nc. 90 minutes\nd. 108 minutes
Answer
Explanation:
Step1: Find Jamle's work - rate
Jamle can paint a wall in 54 minutes. So Jamle's work - rate is $\frac{1}{54}$ of the wall per minute.
Step2: Find the combined work - rate
Connie and Jamle together can paint the wall in 36 minutes. So their combined work - rate is $\frac{1}{36}$ of the wall per minute.
Step3: Find Connie's work - rate
Let Connie's work - rate be $x$ of the wall per minute. Then $\frac{1}{54}+x = \frac{1}{36}$. Solving for $x$: $x=\frac{1}{36}-\frac{1}{54}$ $x=\frac{3 - 2}{108}=\frac{1}{108}$
Step4: Find the time for Connie to paint alone
If Connie's work - rate is $\frac{1}{108}$ of the wall per minute, then the time it takes Connie to paint the wall alone is 108 minutes.
Answer:
D. 108 minutes