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# A painter needed three days to paint the walls of a room

A painter needed three days tp paint the walls of a room. How long would it take him, working at the same rate, to paint a room twice as long, twice as wide, and twice as high?

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Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

U have a little bit misconception………………………..consider only walls & not the top & bottom.

Walls are 2 dimensional figure aren’t they. But he’s given 3 dimensions viz. Long, wide, high. How can it be? Can someone help me out?

surface area of wall=2ab+2bc+2ca.since everything is doubled now new surface area=2*2a*2b+2*2b*2c+2*2c*2a.i.e 4 times of tne existing one.hence days required=4*3= 12 days

Vittal….sorry friend your are wrong.Right answer has been given by Mohit and he also explained it.Better luck next time.

48 days

Hey Mohit…congratulations….you got it right.

Room 1 Surface area: 2 (LXH + WXH)

Room 2 Surface area: 2 (2LX2H +2WX2H)

Answer is 3 X 4 = 12 days