A sum of ₹8,400 amounts to ₹10,899 in $$3\frac{1}{2}$$ years at a certain rate per cent per annum, at simple interest. What will be the amount of the same sum at simple interest for $$4\frac{2}{3}$$ years at double the rate of interest?

A

₹11,732

B

₹7,532

C

₹15,064

D

₹14,672