What will be the simple interest on ₹ 4000 at 121/2%

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What will be the simple interest on ₹ 4000 at 12¹/₂% per annum for the period from 4th February, 2005 to 18th April, 2005 ?

1. ₹ 215
2. ₹ 120
3. ₹ 200
4. ₹ 100
5. None of the above

Correct Option: D

Here, P = ₹ 4000, R = 12¹/₂% = 25 / 2%
T = (24 + 31 + 18) days = 73 days
= 73/365 yr = 1/5 yr
∴ SI = (P x R x T)/100 = (4000 x 25/2 x 1/5 )/100
= ₹ 100