Workshops

The first workshop will do the robot itself in 15 days, the second workshop in 10 days. They started together, but after three days only the second workshop worked. How many days will the work be done?

Correct answer:

t =  8 h

Step-by-step explanation:

3 (151+101)+(t3)/10=1  3 (1/15+1/10)+(t3)/10=1  3t=24  t=8=8 h



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