Technical 2617

Pupils work in groups of two on technical work in the school to make a birdhouse. If Tomáš worked alone, he would make the booth in 4 hours. Richard would do it in 2 hours. If they work together, how many hours will it take them to complete it?

Result

t = 1:20 h Wrong answer

Step-by-step explanation:

(1/4+1/2)t=1  (1/4+1/2) t=1  3t=4  t=34=1.33333333  t=341.333333=1.33333=1:20 h



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