"Haibao" is the mascot of the 2010 World Expo. Among all kinds of "Haibao" dotted on the streets of Shanghai, one "Haibao" has a volume of 2 cubic meters and a density of 1.5 times 10 kilograms per cubic meter. The quality of this "Haibao" is calculated

"Haibao" is the mascot of the 2010 World Expo. Among all kinds of "Haibao" dotted on the streets of Shanghai, one "Haibao" has a volume of 2 cubic meters and a density of 1.5 times 10 kilograms per cubic meter. The quality of this "Haibao" is calculated

Mass equals volume times density, 2 * 1.5 * 10 = 30