The simple interest on a certain sum for 3 whole 1/2 (fraction) years at 7 %p.a. is Rs. 225 more than the simple interest on the same sum for 4 years at 5 %p. a. Find the sum.
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Let sum = P
So P*3.5*7/100 = P*4*5/100 + 225
=> P(245/1000 - 200/1000) = 225
=> P*45/1000 = 225
=> P = 225000/45 = 5000
So sum is Rs 5000
So P*3.5*7/100 = P*4*5/100 + 225
=> P(245/1000 - 200/1000) = 225
=> P*45/1000 = 225
=> P = 225000/45 = 5000
So sum is Rs 5000
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