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Let her income be 100%. Remaining income = (100 - 40)% = 60% Let the money spent on travel and food be Rs. 7x and Rs. 5x respectively. Now, according to question, => 7x – 5x = 612 => x = 306 Total money spent on travel and food together = 12x = 3672 => 60% --- 3672 => 100% ----- 6120 Therefore her income is Rs. 6120.
The difference between the compound interest compounded annually and simple interest of a sum at 18% p.a. for 2 years is Rs. 324. Find the sum.