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Find the difference between simple interest and true discount on Rs. 960 due 4 year hence at 5% per annum simple interest ?
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- Rs. 32
- Rs. 52
- Rs. 42
- None of these
Correct Option: A
S.I. - T.D. = [A x (R.T)2] / [100(100 + R.T.)]
= [960 x (4 x 5)2] / [100 x (100 + 4 x 5)]
= [(960 x 20 x 20) / (100 x 120)] = Rs. 32
