SOLUTION: Jane can paint a 12 by 12 foot wall in 3/4 of an hour. How long will it take her to paint a 15 by 16 feet?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Jane can paint a 12 by 12 foot wall in 3/4 of an hour. How long will it take her to paint a 15 by 16 feet?      Log On


   

Question 570716: Jane can paint a 12 by 12 foot wall in 3/4 of an hour. How long will it take her to paint a 15 by 16 feet?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+12%2A12+=+144+ ft2 of area
Jane's rate of painting is +144%2F%283%2F4%29+ ft2/hr
+144%2F%283%2F4%29+=+%284%2F3%29%2A144+
+%284%2F3%29%2A144+=+192+ ft2/hr
In units:
( ft2 / ( ft2/hr) = hrs
+15%2A16+=+240+ ft2
+240+%2F+192+=+1.25+
It will take her 1 hour and 15 min to
paint the 15x16 ft2 wall