Answer:
0.545g/cm OR 545kg/m(both answers are in cubic)
Explanation:
first we have to find mass of liquid x
mass= density × volume
=25 cubic centimetre × 1.2g/cm
=3g
liquid y= density × volume
=30 cubic centimetre × 0.9g/cm
= 27g
next,we add the two masses
27+3
30g(mass of the whole mixture)
formula for finding density of the mixture
Mass1+ Mass2 ÷ Volume 1+ volume 2
30g ÷55 cubic centimetre
the answer will be a recurring decimal and as we know,we write decimals in 3 significant numbers so we round off
0.5454g/cm= 0.545g/cm and in SI units it's
545kg per cubic meter
