Question
X invested Rs. x at 7% per annum simple interest for 5
years and Y invested Rs. (x + 900) at 9% per annum simple interest for 1 year. If the total interest is Rs. 378, find x.Solution
ATQ:
(x × 7 × 5)/100 + {(x + 900) × 9 × 1}/100 = 378
35x + 9x + 8100 = 37800
44x = 29700
x = Rs. 675
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