Rs. 4300 becomes Rs. 4644 in 2 years at simple interest. Find the sum that will become Rs. 10,104 in 5 years at the same rate of simple interest.

8420

Principal = Rs.4300

Amount = Rs.4644

Simple Interest of two years = Amount - Principal = Rs.344

Simple Int. for one year = Rs.177

Rate of Int. per annum = \(\frac{177}{4300}\) × 100% = 4%

Rate of Int. in 5 years = 4 × 5 = 20%

ATQ,

Principal × 120% = 10104

Principal = 10140 ×\(\frac{5}{6}\)

             = Rs.8420/-