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41. A certain number of 10 paise coins and thrice the number of 20 paise coins add up to 21. If so, the number of 20 paise coins is |
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Answer» LET a common multiple be x As per given information =7×10×x+20×4×x+3×25×x =70x+80x+75x =225x paise ∴9000=225x... ∵Rs90=(90×100) paise ∴x= 225 9000 =40 ∴ No of 25 paise =3X= 225 3×9000
=3×40 =120 |
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