Question
Aman invested Rs. ‘x’ at 9% p.a. and Arjun invested
Rs. (x + 400) at 7% p.a. If after 4 years the total simple interest is Rs. 1800, find the value of ‘x’.Solution
According to the question,
(x × 0.09 × 4) + {(x + 400) × 0.07 × 4} = 1800 Or, 0.36x + 0.28x + 112 = 1800 Or, 0.64x = 1688 Or, x = 1688 / 0.64 = 2637.5 Or, x = Rs. 2637.50
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