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Sue can sew a precut dress in 3 hours. helen can sew the same dress in 2 hours. if they work​ together, how long will it take them to complete sewing that​ dress? round to one decimal place.

Respuesta :

claudettoterohil
1/3 + 1/2 = 1/t


The LCD is 2*3*t. 

If you multiply everything by the LCD, you can clear your fractions.


6t (1/3) + 6t (1/2) = 6t (1/t)

2t + 3t = 6

5t = 6

5t/5 = 6/5


Answer: 
Which is: t = 1.2 hrs. 

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