The densities of three metal alloys, A, B and C, are in the ratio

9 : 13 : 17

1 m³ of alloy B has a mass of 7400 kg.

Work out the difference between the mass of 7 m³ of alloy A and 5 m³ of alloy C.

Give your answer correct to 3 significant figures.

9 : 13 : 17

1 m³ of alloy B has a mass of 7400 kg.

Work out the difference between the mass of 7 m³ of alloy A and 5 m³ of alloy C.

Give your answer correct to 3 significant figures.

Please do post your thoughts or workings. But if you haven't had a clue on how to start...

I wonder if you have covered this, but the formula for density in spoiler:

I wonder if you have covered this, but the formula for density in spoiler:

Spoiler

Original post by username6076459

The densities of three metal alloys, A, B and C, are in the ratio

9 : 13 : 17

1 m³ of alloy B has a mass of 7400 kg.

Work out the difference between the mass of 7 m³ of alloy A and 5 m³ of alloy C.

Give your answer correct to 3 significant figures.

9 : 13 : 17

1 m³ of alloy B has a mass of 7400 kg.

Work out the difference between the mass of 7 m³ of alloy A and 5 m³ of alloy C.

Give your answer correct to 3 significant figures.

"1 m³ of alloy B has a mass of 7400 kg"... so can you deduce the density of B?

Then use the ratio information to find the densities of A and C?

Then use D=M/V to deal with the masses.

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