Question 840361
Let time taken by Emily be x 
then alieen take 2/3 of x = 2x/3

1 min work of emily = 1/x
1 min work of alieen ={{{1/(2x/3)}}} => 3/2x
i min work of both = 1/45
1/x + 3/2x = 1/45
5/2x = 1/45
1/x = 2/225
Emily take 225/2 mins to complete the work, then alieen = 225/2*2/3 = 75 mins