Practicing Success
A sum lent out at simple interest amounts to Rs. 6076 in 1 year and 7504 in 4 years. The sum and the rate of interest per annum are respectively: |
5600, 8.5% 5600, 9% 5400, 9% 5400, 10% |
5600, 8.5% |
Simple interest remains same after every year; ⇒ 3 years simple interest ⇒ 7504 - 6076 = 1428. ⇒ 1 year simple interest = \(\frac{1428}{3}\) = 476 Therefore. Principal ⇒ Amount (at the end of 1st year) - S.I. of 1 year ⇒ 6076 - 476 = Rs.5600 S.I. = \(\frac{P × R × T}{100}\) ⇒ 476 = \(\frac{5600 × R × 1}{100}\) ⇒ R = \(\frac{476 }{56}\) = 8.5% |