Strawberries

The father collects strawberries himself in 2 hours and the son in 9 hours. How long will it take them to join him when he comes to help his son collect strawberries after 3 hours?

Final Answer:

x =  1.09 h

Step-by-step explanation:

2x+9x+3=1  x/2+(x+3)/9=1  11x=12  x=1112=1.09090909  x=11121.090909=1112 h=1.09 h



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