1.7 A student measures the density of a piece of steel. She uses the method of displacement to find its volume. Her measurements are shown in the diagram. Calculate the volume of the steel and its density. Solution: Step 1: Observe the given diagram carefully and write down the given data Mass M = 620g Volume of steel block V = (water level reading after steel block immerse - water level reading before steel block immerse) V = 180cm3- 80cm3 V = 80 cm3 Step 2: Put values in density formula D = 7.75 g/cm3