BPSC 46th Exam Prelims 2004 Solved Paper

Question : 91 of 150

Marks: +1, -0

One volume of zinc (density 7100 kg-

m^{–3}

) is mixed with two volumes of copper (density 8900 kg

m^{–3})

to make brass. The density of brass is –

Solution:

Density of zinc

=7100 {kg} {/} {m}^{3}

Density of copper

=8900 {kg} {/ } {m}^{3}

One volume of zinc

=7100 \times 1=

7100
Two volume of copper

=8900 × 2

=17800

Therefore, the density of brass

=\;{(7100+17800)}/{3}=\;{24900}/{3}

=8300 {kg} {/} {m}^{3}

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