990
40
990
m 1 =
040
050
0 130

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Explanation:

50

Explanation:

a triangle adds up to 180 ° and 90 is given and we know the bottom angle is 40 because it is the same as the other 40 which also only leaves 50 to M1 because 90+40=130

180-130=50

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3