Answer :
Let W1 be the work done by firstmachine.
Let W2 be the work done by second machine.
Work done by both the machines is Wt = W1xW2
Wt = 81 = 9x9
9x9 = 3x3x3x3
W1xW2 = 32x32
W1 = W2 = 32
Therefore, the two repeater machines are (x32) and (x32).
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