A sum of ₹5,000 amounts to ₹7,200 in 8 years at a certain rate per cent p.a, interest compounded yearly. What will be the compound interest on a sum of ₹6,550 in 4 years at the same rate of interest?

₹1,310

Principal  :  Amount

\(\sqrt {5000 }\)  :   \(\sqrt {7200 }\)

\(\sqrt {25 }\)  :   \(\sqrt {36 }\)

5  :   6

ATQ,

5R = 6550

1R = Rs.1310