It has nothing to do with the volume of the ethanol, the same question could be asked with water or chloroform etc. All that is required is the volume of the piece of lead. This is equal to mass/density = 10.0/11.4 = 0.88cm3 = 0.88mL. So the volume of the ethanol will be increased by 0.88, Therefore the answer is 30 + 0.88 = 30.88mL