Q.

When equal volumes of two substances are mixed, the specific gravity of the mixture is 4 . When equal weights of the same substances are mixed, the specific gravity of the mixture is 3 . The specific gravities of the two substances could be

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a

6 and 2

b

3 and 4

c

5 and 3

d

2.5 and 3.5

answer is A.

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Detailed Solution

4=Vd1+Vd22V or d1+d2=8 3=m+mm/d1+m/d2  or 2d1d2d1+d2=3 Solving Eqs. (i) and (ii), we get d1=6 and d2=2

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