Garden mowing

Eve can mow a garden in 4 hours, and Deborah can mow it in 3 hours. How long would it take to mow the garden if Eve started one hour earlier and then Deborah joined her?

Final Answer:

t =  2.2857 h

Step-by-step explanation:

4t+3t1=1  t/4+(t1)/3=1  7t=16  t=716=2.28571429  t=7162.285714=2.2857 h



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