How to find mass and volume?
Had a problem in class need help solving. Planet X has 3 crusts.
Crust A has a avg density of 2.85cm^3.
Crust B has a avg density of 4.5cm^3.
Crust C has a avg density of 11.5cm^3.
Total Volume of the planet is 100,000cm^3
Find the mass of each crust.
Find the volume of each crust.
Please explain how to solve this problem and show how to work it out also.
Answer by Mu*aCaliMu*aSaigon
density= mass/ volume
or mass = density. volume
you simply don’t have enough info to solve it.
what you have here
V1+V2+V3= 100 000 cm³
d1= 2.85 mass/ V1 cm³ [what is the unit for Mass?]
d2= 4.5 mass 2/ V2 cm³
d3= 11.5 mass 3 / V3 cm³
add them up
d1+d2+d3= m1/V1 + m2/V2 + m3/V3
V1+V2+V3= m1/d1+ m2/d2 + m3/d3
100 000 = ( m1d2d3+ m2d1d3 + m3d1d2)/d1d2d3
you still have three unknown to solve for.
Know better? Leave your own answer in the comments!