Question

Three liquids of densities $d , 2 d$ and $3 d$ are mixed in equal volumes. Then the density of the mixture is

• A. d
• B. 2d
• C. 3d
• D. 5d

Answer 1

Answer: (B)

2d

Answer 2

$\frac { m _ { 1 } + m _ { 2 } + m _ { 3 } } { 3 V } = \frac { V ( d + 2 d + 3 d ) } { 3 V }$= 2d.