ACT question that do not know how to solve
in Word Problem Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

The painter can paint one house in 20 hours, so his rate of working is 1/20 house per hour. His assistant would take 4 times as long—80 hours.

His assistant’s rate is 1/80 house per hour.

Their combined rate is 1/20+1/80=4/80+1/80=5/80=1/16 house per hour.

1/16 house per hour = 16 hours for one house, so it takes them 16 hours working together.

 

by Top Rated User (599k points)

Related questions

Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
81,955 questions
86,350 answers
2,238 comments
71,715 users