A and B are partners sharing profit in the ratio of 3:2. On 31st March, 2023, the Capital Account balance stood as A-₹1,29,000 and B- ₹86,000. The divisible profit of ₹50,000 has been distributed between A and B accordingly and Interest on capital @ 10% p.a. has also been credited. A has also obtained a salary @ ₹10,000 annually. Calculate Interest on B's capital.

₹6,000

Closing Capital of B                                       = ₹86000
Less: Share of profit (50000 x 2/5)               = 20000
         Opening capital + Interest on capital  = 66000

This 66000 include interest on capital also. So,
Opening capital + Interest on capital  = 66000
Opening capital + opening capital x 10/100 = 66000

Let opening capital is a
a + (a X 10/100) = 66000
a + 10a/100 = 66000
110a/100 = 66000
a = 66000 x 100/110
   = 60000
Thus opening capital = 60000 and interest is calculated on opening capital.
So, interest on B's Capital = 60000 x 10/100
                                          = 6000