Brennan has one rope that is 90 cm long, and the other rope is 120 cm long. He wants to cut both ropes so that all of the pieces are the same length. What is the longest length he can make?
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Step-by-step explanation:
hcf of 90,120
90=3×3×10
120=4×3×10
hcf =30
longest length he can make =30
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