What volume of alcohol with a density of 8.4 x 102kgm-3 will have the same mass as 4.2m3of petrol whose density is 7.2 x 102kgm-3? - SchoolNGR

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What volume of alcohol with a density of 8.4 x 102kgm-3 will have the same mass as ...

What volume of alcohol with a density of 8.4 x 10²kgm^-3 will have the same mass as 4.2m³of petrol whose density is 7.2 x 10²kgm^-3?

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A 14m³
B 3.6m³
C 4.9m³
D 5.0m³
E 5.8m³

Correct Answer: Option B

Explanation:
Mass = Density x Volume
4.2 x 7.2 x 10² = v x 8.4 x 10²
= 3.6m³

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