Request a call back Asked by aastharoy997 | 07 May, 2020, 10:21: AM Expert Answer
Question: A sum of Rs. 20,000 was invested partly at 10% p.a. simple interest and partly at 15% p.a. simple interest. If the total interest on the sum was Rs. 2400 at the end of one year, find the sum invested at 10% p.a.
Solution:
Let Rs. P1 and Rs. P2 invested partly at 10% p.a. simple interest and 15% p.a. simple interest respectively.
I1=(P1 x N x R)/100 = 10P1/100  and  I2=(P2 x N x R)/100=15P2/100
According to the question,
P1+P2 = 20000 ... (i)
And, I1+I2 = 2400 Answered by Renu Varma | 07 May, 2020, 11:44: AM

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