Let the principal be Rs. p,
Rate of interest is 10% and
time = 6 years.
Amount received at the end of 6 years = 16000 Rs.
Amount = Principal + S.I
= p + (p * n * r)/100
—> 16000 = p + (p x 10 x 6) / 100
—> 16000 = p + (6p/10)
—> 16000 = 16p/10
—> p = 16000 x (10/16)
—> p = 1000 x 10
—> p = 10,000 Rs.
Principal = Rs. 10,000.