Question
A construction worker welded 3 pipes of length 1 m 30 cm each together. This newly-welded pipe was only 23 of the length he needed. How long was the pipe he needed?
4 m

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A construction worker welded 3 pipes of length 1 m 30 cm each together. This newly-welded pipe was only 23 of the length he needed. How long was the pipe he needed?