Mandy works construction. She knows that a 5 meter long metal bar has a mass of 40 kg. Mandy wants to figure out the mass (w) of a bar made out of the same metal that is 3 meters long and the same thickness. What is the mass of the shorter bar?

Question

Mathematics

Ezekiel Delgado

Today, 04:58

Mandy works construction. She knows that a 5 meter long metal bar has a mass of 40 kg. Mandy wants to figure out the mass (w) of a bar made out of the same metal that is 3 meters long and the same thickness. What is the mass of the shorter bar?

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Answers (1)

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Madeleine Montgomery · Answer 1

If you take the weight and divide it by the length, you get the weight-per-meter. So, 40 (kg) divided by 5 (meters) gives you 8 kilograms per meter. Then to find the weight of the shorter bar, you'd multiply it's length by the number you just found. In conclusion, the shorter bar weighs 24kg.