Find The rate % based question

Find The rate % based question
Find the Rate % based questions are given in bank exams and Time will be given. just using formula u get rate percent.


Example 1:
At what rate percent annum will a sum of money double in a 4 years.
Answer :
Let Principle is = P.Then S.I = P and Time = 4 years.
S.I. = ( PRT/100 ).
So, R = ( 100X P / P X T ) %.
R = 25%

Similarly we learn another example:
Example 2:
A sum of money is in double in 12 years At what rate percent per annum.
Answer :
Let Principle = P. Then S.I = P and T is given 12 years.
Rate = ( 100 X P / P X 12 ) = 8.33%
So R = 8.33 %

Example 3:
If the Simple interest accured in 8 years on a principal of Rs.40,000/- is 8000 of the principal.What is the rate of simple interest p.c.p.a?
Answer :
SI = PRT / 100
Let the rate of simple interest is x
So
x = 100 x 8000 / 40000 x 8
x = 2.5
So the rate of simple interest is 2.5.


Example 4:
What is the rate of p.c.p.a ? If the simple interest accrued on amount of Rs.25500 at the end of 3 years is 9180.
Answer :
we know the formula is S.I = PRT / 100
So, S.I = 9180 , P = 25500 , T = 3 years , R = ?
9180 = 25500 x R x 3 / 100
R = 9180 / 765 =  12 %
So rate of p.c.p.a = 12 %

• Compound Interest shortcut tricks
• Find Principle or Sum based question
• Find Simple interest based question
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