Question

Rohit invested a certain amount at a simple interest rate of r% per annum, which increased to 180% of the original amount over 5 years. If Rs. 2500 is invested at the same simple interest rate (r% p.a.) for 2 years, what will be the interest earned?

Q: Answer-Rohit invested a certain amount at a simple interest rate of r% per annum, which increased to...

Let the sum invested be Rs. P Therefore, interest earned in 5 years 1.8P - P Rs. 0.8P ATQ 0.8P P X r X 5 100 Or, r 80 5 Or, r 16 So, required interest earned 2500 X 16 X 2 100 Rs. 800

A Rs. 750

B Rs. 640

C Rs. 800

D Rs. 960

E Rs. 720

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Rohit invested a certain amount at a simple interest rate of r% per annum, which increased to 180% of the original amount over 5 years. If Rs. 2500 is invested at the same simple interest rate (r% p.a.) for 2 years, what will be the interest earned?

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