Mukesh borrowed a sum of rs. 10000 at simple interest from a bank. after two years he takes rs. 12000 more as loan and discharge all the debt at the end of next 3 years depositing rs. 27160 to the bank. what is the rate of interest per annum?
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Mrs. Reeta deposited a sum of Rs.8400 in a bank for 4 years at the simple interest.

After 2 years the interest for this prinicipal sum is

Thus, total amount after 2 years is
She withdrew Rs.5200 from.
Thus the remaining sum is

Thus, total amount after 4 years is

She received Rs.5288.
Therefore,

Solving this quadratic equation,

The rate of interest can't be negative.
Thus, the rate of simple interest isper annum.

After 2 years the interest for this prinicipal sum is

Thus, total amount after 2 years is
She withdrew Rs.5200 from.
Thus the remaining sum is

Thus, total amount after 4 years is

She received Rs.5288.
Therefore,

Solving this quadratic equation,

The rate of interest can't be negative.
Thus, the rate of simple interest isper annum.
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