Question

If 1kg of water is mixed with 2kg of liquid of density 3g/cm3, then the average density of mixture will be
1)2.4g/cm3
2)1.5g/cm3
3)2g/cm3
4)1.8g/cm3

Answer 1

d=M/V
3=2000/V
V=2000/3
D=M/V
=3000/1000+2000/3
=3000×3/5000
=9000/5000
=4.5