For getting the mass of the truck, we have to just multiply the volume with the liquid density given and then add up the empty truck mass with it.
Mass of the truck = (Volume x liquid density) + empty mass of the truck
= (28,000 x 0.90) + 15,500 kg
= 25,200 + 15,500
= 40,700 kg
A liquid's density is a gauge of how heavy it is relative to the amount being measured.
The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts. A substance which is less denser than water will float if it is gently put on the water's surface.
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