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A single-phase, $\text{4 kVA}$, $\text{200 V/100 V}$, $\text{50 Hz}$ transformer with laminated $\text{CRGO}$

steel core has rated no-load loss of $\text{450 W}$. When the high-voltage winding is
excited with $\text{160 V}$, $\text{40 Hz}$ sinusoidal ac supply, the no-load losses are found to be

$\text{320 W}$. When the high-voltage winding of the same transformer is supplied from

a $\text{100 V}$, $\text{25 Hz}$ sinusoidal ac source, the no-load losses will be

_____________________$\text{W}$ (rounded off to $2$ decimal places).
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