Here, Principal (P) = *₹* 1,200, Rate (R) = 12% p.a., Time (T) = 3 years

Simple Interest =(Px R x T)/100

=(1200 x 12 x 3)/100

= *₹ *432

Now, Amount = Principal + Simple Interest

= 1200 + 432

= *₹* 1,632

(b) Here, Principal (P) = *₹* 7,500, Rate(R) = 5% p.a., Time (T) = 3 years

Simple Interest =(Px R x T)/100

=(7500 x 5 x 3)/100

=*₹*1,125

Now, Amount = Principal + Simple Interest

= 7,500 + 1,125

= *₹* 8,625