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Atul roy

· started a discussion

· 1 Months ago

Trick (Question: 109043.0 )

It's too long to solve,any short trick..Many time such type of question asked??

Question:
An amount becomes \(\unicode{x20B9} \)3795 in 3 years and \(\unicode{x20B9} \)4537.50 in 7 \(\cfrac{1}{2}\) years on simple interest. Find the rate of interest.
Options:
A) 6% per year
B) 4% per year
C) 4.5% per year
D) 5% per year
Solution:
Ans: (d) Let the principal be P and rate be r%.

From question,


Dividing equ. (ii) by equ. (i), 


Knowledge Expert

· commented

· 1 Months ago

Dear Student,
4.5r=742.5 r=165 hence principle =3300
165/3300=5%rate
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