Question

find the amount to be paid at the end of three year in each case
principal =$1200 at 12 percent ​

Answer 1

Given P = 1200, R = 12%, T = 3 years.

We know that SI =

$\frac{ p\times r\times t\ }{100}$

$\frac{1200\times 12 \times 3}{100}$                         

$\frac{43200}{100}$

=₹432

Amount = Principal + Interest
= 1200 + 432
= 1632.

The amount to be paid = ₹1632

Answer 2

a Principal =P= RS.1200

Rate of interest =R=12%p.a.

Time =T=3 years

Simple Interest=PTR/100

=1200×3×12/100

=Rs.432

Therefore amount=Principal + Interest

=Rs.1200+Rs.432

=Rs.1632 ANS.

b. Principal=P=Rs.7500

Time=T=3 years

Rate of interest=R=5%

Simple Interest=PTR/100

=7500×3×5/100

=Rs.1125

Therefore, amount= Principal + Interest

=Rs.7500+Rs.1125

=Rs.8625 ANS.