Find the time for 2 people working together to complete half of a task if it takes them 8 hours and 10 hours to complete the entire task working individually.

Question

Thank you!!!

Answer 1

so it takes them 4 hours and 5 hours to complete half the task individually,

time=1/(1/4 + 1/5)

time=20/9 hrs

this comes from the rate equation...

rate= task/time
combination rate=task/time1 + task/time2 or the combination rate is the sum of rates.