How Many Days Taken by Them? If
Answer: (3) 4 : 3
The rates working of A and B are in the ratio = 3 : 4
The number of days taken by them = in the inverse ratio of working ratio.
Then , the number of days taken by them to finish the work are in the ratio = 4 : 3
Hence, the answer is (3) 4 : 3.