Question

1. Find principal, if Amount = 3672 and Interest = 72.

2. Find the simple interest and amount if Principal = 3800, R = 3.5%, Time = 4 years

3. Find the time, if Principal = 34800, SI = 1900, Rate p.a = 7.5%


4. Find the interest on a deposit of 3650 from 3 January 2016 at the rate of 10%
March 2016?

5. A certain amount of money amounts to 4400 in two years and 4600 in three
the principal and rate of interest.

6. Find amount, if principal = 450, Rate (p.a) = 7% Time = 5 years.​

Answer 1

Answer:

1. Principal=Amount-Intrest

P=3672-72

P=3600

2. S.I.=P*R*T/100

=3800*3.5*4/100

=38*3.5*4

=532

3. T=S.I.*100/P*R

=1900*100/34800*7.5

=190/348*75

=40.9 years

4. S.I.=P*R*T/100

=3650*10*3/100

=365*3

=1095

5. S.I.=A-P

=4600-4400

=200

R=S.I.*100/P*T

=200*100/4400*2

=100/44

=25/11

=2.27.. %

6. S.I.= P*R*T/100

=450*7*5/100

=45*7/2

=315/2

=157.5

A=P+S.I.

=450+157.5

=607.5