Question

calculate the amount and compound interest by using the formula when principal=4000, rate=4 paisa per rupee, time =3 years​

Answer 1

ANSWER

Principal (P)=Rs.4000

Rate of Interest (r)=10%

Time =2 years and 3 months

Here first we take n=2 years.

⇒  Amount for first 2 years (A)=P(1+100r)n

                                                      =4000(1+10010)2

                                                      =4000(1011)2

=4000×100121

                                                      =Rs.4840

⇒  The amount after two years =Rs.4840

⇒  Now, Principal =Rs.4840

Simple interest for last 3 months i.e. 41years =100PRT

                                                                             =100×44840×10×1

=Rs.121

⇒  Amount after 2 years and 3 months =Rs.4840+Rs.121=Rs.4961

⇒  C.I.=A−P

                =Rs.4961−Rs.4000

                =Rs.961

∴  The compound interest is Rs.961

Answer 2

Answer:

Compound Interest= 499.456

Amount= 4499.456