Question

. Deepa borrowed ₹9000 from her neighbour. Out of which ₹3000 were
borrowed at 12% and the remaining at 15% rate of interest per annum. What
is the total interest after 3 years?

Answer 1

Answer:

The total interest = ₹ 3780

Step-by-step explanation:

Given data

Deepa borrowed  ₹ 9000 for her neighbor

in total amount, ₹3000 borrowed at 12% per annum for 3 years

the remaining amount ₹6000 borrowed at 15% per annum for 3 years

Here we need to find total interest after 3 years

interest on P = ₹3000 at rate R = 12% for  T= 3 year  

⇒  interest I = $\frac{PTR}{100}$  =  $\frac{3000(3)( 12) }{100}$  =  30(3)(12) = ₹ 1,080  

interest on P = ₹6000 at rate R = 15% for  T = 3 years

⇒ interest = $\frac{6000(15)(3)}{100}$ = 60(15)(3) =  ₹2,700

total interest = ₹ 1080 + ₹ 2700 = ₹ 3780