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Fifteen post cards cost Rs 2.25. What...

Fifteen post cards cost Rs 2.25. What will be the cost of 36 post cards? How many postcards can we buy in Rs 45?

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RD SHARMA-RATIO, PROPORTION AND UNITARY METHOD-All Questions
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  14. Two numbers are in the ratio 7:9. If the sum of the numbers is 112, ...

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