A person A can paint a house in 30 days. A second person B can paint the same house in 36 days. Both A and B work together for 15 days. Then, A goes away. The number of days that B takes to complete the painting is (in days)
(1) 3
(2) 4
(3) 5
(4) 6
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3 days more which means 1( option is correct
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