The four walls and ceiling of a room of length 25 m, breadth 12 m and height 10 m are to be painted. Painter A can paint 200 m2 in 5 days, Painter B can paint 250 m2 in 2 days. If A and B work together, they will finish the job in ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2
A paints 200/5 = 40 m2/day
B paints 250/2 = 125 m2/day
Area to be painted = 2(25+12)10 + 25 × 12 = 1040 m2
Together, A and B can finish the job in 1040/(40+125) - 1040/165 = 208/33 days