[計量] 請問4月JJ 54
all the machines have the constant rate, 2 machines need
k hours, 3 machines need 6(?)hours to complete, what's the
value of k?
設三台機器速度為 A B C
1/(A+B)=k
1/(A+B+C)=6
要怎麼推出CD上的答案???
K=6/(1-6C)
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