Adjusting 72554

Two working groups are adjusting the park. The first group would do the work in 15 days, and the second in 25 days. How many days will they do the work together?

Correct answer:

t =  9.375 d

Step-by-step explanation:

t1=15 d t2=25 d  t (t11+t21) = 1  k=t11+t21=151+251=755+753=755+3=7580.1067  t k=1  t=1/k=1/758=1:758=1 875=81 75=875=875 d=9.375 d



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