contestada

Joan can type 50 letters in three hours. When Jill helps, they can do the job in one hour. How long would it have taken Jill to do the job alone?

Respuesta :

well if it went from taking 3 hours per 50 words then  jill helped and it got done in 1 hour i would say it would of taken jill 2 hours.

Answer:50 in 1.5 hours.

Step-by-step explanation:

If Joan can do 50 in 3 hours, then in 1 hour, that’s 50/3.  

Jill completes the rest of the 50, so 50-(50/3) is how many letters Jill can type in an hour.  

50-(50/3)=(150/3)-(50/3)=100/3 letters in an hour. If Jill can write 100 letters in 3 hours, then she can write 50 in 1.5 hours.