arsalaniaya arsalaniaya
  • 17-01-2023
  • Mathematics
contestada

trois professeurs de math ont corrigé en deux heures 100 copies
a) combien de proffesseurs faudrait-il pour corriger 50 copies en 20 minutes?
b) combien de temps mettraient 9 proffesseurs pour corriger ces 9 copies?

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