X & Y are partners, they admit Z in their firm. On the admission of Z there was a Machinery with book value of ₹72,000 out of which 1/3rd is sold for 30,000 and balance is revalued at ₹57,600. With what amount there will be total increase in value of machinery?

₹15,600

The correct answer is option 4- ₹15,600.

Machinery value = ₹72,000

Sold by firm  = 1/3
                  = ₹72,000 x 1/3
                  = 24,000
Machinery of ₹24,000 was sold for ₹30,000 
Increase in value = 30,000 - 24,000
                          = 6,000

Remaining Machinery = 72,000 - 24,000
                               = ₹48,000
Machinery of ₹48,000 is revalued at ₹57,600.
Increase in value = 57,600-48,000
                         = 9,600

So, total increase = 9,600 + 6,000
                              =  ₹15,600