Question: A wattmeter reads 4 . 5 kW when its current coil is connected in the R phase and its voltage coil is connected between R

A wattmeter reads 4.5 kW when its current coil is connected in the R
phase and its voltage coil is connected between R phase and neutral of
a symmetrical 3 phase system supplying a balance load of 20 A at 415V.
What will be the reading of the wattmeter if the current coil remains
unchanged and voltage coil is connected between B and Y phases?
The phase sequence is RYB

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