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

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