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?
A
14m3
B
3.6m3
C
4.9m3
D
5.0m3
E
5.8m3
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Mass = Density x Volume
4.2 x 7.2 x 102 = v x 8.4 x 102
= 3.6m3
Source: Myschool Past Questions Archive (Record #28671)