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Skilled workshop master washes client car 1/5 hour, cleaned the client's car in 5/4 hour, and painted small defects on car 1 1/3 hour. How long did it take him to do all the necessary work tasks?

Correct result:

t =  2.7833 h

Solution:

m=113=1 3+13=431.3333 h  t=15+54+m=15+54+1.3333=16760=2.7833 h



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