Answer :
Density = mass / volume
Mass = density x volume
= 3 x 900
= 2700 g
If 1000 g = 1 kg
Then 2700g = 2700/1000=2.7 kg
Hence the mass is 2.7 kg
Mass = density x volume
= 3 x 900
= 2700 g
If 1000 g = 1 kg
Then 2700g = 2700/1000=2.7 kg
Hence the mass is 2.7 kg