Question
Ravi spends 80% of his monthly salary. He also receives a
bonus every month which is 10% of his salary. If his annual saving is Rs. 132000, find the bonus received by Ravi every month. [Monthly income = salary + bonus]Solution
Let the salary of Ravi be Rs. xBonus = 0.10xMonthly income = x + 0.10x = 1.10xAnnual income = 1.10x × 12 = 13.2xSavings = 20% of 13.2x = 0.20 × 13.2x = 2.64x2.64x = 132000 ⇒ x = 132000 / 2.64 = Rs. 50000Bonus per month = 0.10 × 50000 = Rs. 5000
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