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Q.

A block of metal has a mass of 30 kg and a volume equal to 4 liters. Its density is__ kg/L?


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a

7.5

b

7

c

0.75

d

750 

answer is A.

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Detailed Solution

Its Density is 7.5 kg/L.
It is known that the density of a substance is given as mass by volume.
Now,
Density of metal=Mass of metalVolume of metal 
Density of metal= 304 Density of metal =7.5.
  
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