SOLUTION: A beam 3cm. wide and 5 cm deep can support a load of 630 kg. What load can it support when turned on it's side? I don't understand what to do with this question.

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Question 190318This question is from textbook algebra and trigonometry structure and method book 2
: A beam 3cm. wide and 5 cm deep can support a load of 630 kg. What load can it support when turned on it's side?
I don't understand what to do with this question. This question is from textbook algebra and trigonometry structure and method book 2

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The amount of weight a rectangular cross-section beam can support is directly proportional to the square of the horizontal dimension and to the cube of the vertical dimension, i.e.



For your problem:



Hence



So:



If you turn the beam on its side (note the switch of values between H and V):



John