Posted by Tyler on Monday, February 18, 2008 at 8:51pm.
A painter needs 3 days to paint the walls of a room. How long would it take him, working at the same rate, to paint a room that is twice as long, twice as wide and twice as high as the original room?

Math  Reiny, Monday, February 18, 2008 at 9:16pm
we are looking at the surface area.
so each wall is four times as large as before. (eg. if one wall is lw, then the corresponding new wall is (2l)(2w) or 4lw)
So it would take him 12 days
(BTW, I could paint that room in 3 hours).
Answer This Question
Related Questions
 Math  A painter needs 3 days to paint the walls of a room. How long would it ...
 Geometry  A gallon of paint costs $20 and covers 465 square feet. Three coats ...
 math  If painter A can paint a room in three hours by themselves, and painter B...
 Math  Jayce wants to paint her room Duke Blue.Her room is 12 ft long ,12 ft ...
 Intermediate Algebra  Joe can paint a room in 6 hours while Sue can paint the ...
 Geometry  a room is 18 feet long and 14 feet wide with walls 10 feet high. If ...
 Math  If a room is 13 feet long and 12 feet wide. The ceiling is 8 ft high. I ...
 Math help please  A painter used 1 1/2 gallons of paint to paint 3/4 of a room...
 Math  A painter can paint a racquetball court in 8 hours. His assistant needs ...
 Math  John can paint a room in 3 hours. His apprentice, working alone, requires...
More Related Questions