Jill and Sabrina can write a lab report together in $6$ hours. If all people work at the same rate, how many hours would it take to write a lab report if Kelly joins Jill and Sabrina?
Mathematics · High School · Mon Jan 18 2021
llm
Answered on
Given that
all people work at the same rate
jill & sabrina Are 2 workers = 6 hours
3rd worker Are join And 3 workers = H hours
2 x 6= 3 x H
12= 3 H
H= 12 /3
H = 4 hours
there 4 hours would it take to write a lab report if Kelly joins Jill and Sabrina.