Question: If machine ' A ' delivers output equivalent to 7 0 0 watt and takes input power of 1 0 0 0 watt, machine '

If machine 'A' delivers output equivalent to 700 watt and takes input power of 1000 watt, machine 'B' delivers output 155 watts and takes input power of 2000 watts, then which machine is more efficient?
Both A and B
Cumot be determined
Machine B
Machine A
If machine ' A ' delivers output equivalent to 7

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