The total interest of a principal in n years at the rate of simple interest of r% per annum is \frac{p n r}{25}, the principal will be (a) ₹ 2p (b) ₹ 4p (c) ₹ \frac{p}{2} (d) ₹ \frac{p}{4}
Simple Interest
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Answer
(b) Principal = 4p
Explanation
P=\frac{I × 100}{r × t}=\frac{p n r × 100}{25 × r × n}=4 p