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A purse has Rs. 34.5 in the form of 1-rupee, 50-paise and 10-paise coins in the ratio of 6 ∶ 9 ∶ 10. Find the number of 10-paise coins.1). 102). 303). 204). 40 |
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Answer» Let TOTAL coins in the purse are x. ⇒ 1-rupee, 50-paise and 10-paise coins would be 6X, 9x and 10x respectively. Total amount is Rs. 34.5 ⇒ 6x × 1 + 9x × 0.5 + 10x × 0.1 = 34.5 ⇒ 6x + 4.5x + x = 34.5 ⇒ 11.5x = 34.5 ⇒ x = 3 ∴ NUMBER of 10-paise coins = 10 × 3 = 30 |
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