bartlettlily69
bartlettlily69 bartlettlily69
  • 17-04-2021
  • Mathematics
contestada

A machine can grade 30 tests in 2 minutes. At this rate, how long will it take the machine to grade 135 tests?

8 minutes


9 minutes


10 minutes

12 minutes

Respuesta :

haybuckets8
haybuckets8 haybuckets8
  • 17-04-2021
ANSWER: 9 minutes

WHY:

30/2= 15 so 15 tests per minute

135/15=9 so nine minutes for 135 tests


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