Full Bridge VSI problem
Both the solutions are crap !!

VR = 0.7 * VDC = 0.7 * 100 = 70V ........Case of full bridge inverter

where VR is peak value of fundamental component

Vo = VR * [(-JXc||R)/(-jXc||R + jXl)] .......Voltage divider

On solving we get peak of fundamental component of Vo = 62.76V