Book Maths Puzzle General Ability

A beam , the section of which is square ,is 27 times as long as it is wide and its volume is 8 m3 .Find its length.

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Book Other Question

Find the sides of two squares ,which contain together 12.25 hectares ,the sides of the squares being in the ratio of 3:4. Three numbers are to one another as 2:3:4.The sum of their cubes is 33957.Find the numbers.