tmickens tmickens
  • 15-06-2017
  • Mathematics
contestada

Wilma can mow a lawn in 80 mintues.Melissa can mow the same lawn in 120 minutes. How long does it take for both Wilma and Melissa to mow the lawn if they working together ?

Respuesta :

wolf1728
wolf1728 wolf1728
  • 15-06-2017
There is a formula for that;
Total time = (Worker 1 * Worker 2) / (Worker 1 + Worker 2)
Total time = (80 * 120) / (80 + 120)
Total time = 9,600 / 200
Total time = 48 minutes





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