A sum of Rs. 6500, at simple quarterly interest of 8% p.a., will result in what amount in 2 and half years?

Rs. 7800

According to the question:

Principle: 6500, Rate of Interest - 8% p.a., Rate - 2% (quarterly) Time - 10 quarters ( 2 \(\frac{ 1}{ 2}\) years)

Formulae for SI = \(\frac{\text{P Χ R Χ T} }{ 100}\) 

Putting the values in the formulae:

SI = \(\frac{\text{6500 Χ 2 Χ 10 }}{ 100}\) 

SI = \(\frac{\text{130000} }{ 100}\)

SI = 1300

Amount = Principle + Simple interest

Amount = 6500 + 1300

Amount = 7800