Question

the difference between Si and CI on a certain sum for 2 years at 7.5 % per annum is Rs 360. find the sum​

Answer 1

Given

Rate of interest =7.5%

Time=2yr

Difference between Ci and si =₹360

Let sum =₹100

Si = pxrxt /100

Si=100x7.5x2/100

Si=15

A=p(1+r/100)^t

A=100(1+7.5/100)²

A=100(107.5/100)²

A=115.56

Ci=A-P

=115.56-100

=15.56

Difference between Ci and si =15.56-15

=0.5625

According to the question it is 360

So 1 unit assumed = 360/0.5625

=640

Then sum=100x640

=64000

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