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QUESTION
Q
Ravi borrowed a certain sum from Kiran at a certain rate of simple interest for 2 years. He lent this sum to Rahul at the same rate of interest compounded...
Solution
Let the sum borrowed by Ravi be = S
Let, the rate of interest be = r
Simple interest obtained on amount S for 2 years is = Rs.4000
Therefore, Simple interest obtained on amount S for 1 year is
= 4000/2 = Rs.2000
Therefore...
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Solution
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Keynote
Let, Compund interest obtained on sum S in 1st year at a rate of interest r be = C1
Let, Simple interest obtained on sum S in 1 year at rate of interest r be = S1
Then, C1 = S1
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Compound...
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