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The cost of 140 tennis balls is Rs.4900. Find the cost of 2 dozen such balls. |
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Answer» More the no of tennis balls, more will be the cost. So it is a direct proportion. Let the cost be Rs x, \(\frac{4900}{140}=\frac{\text{x}}{2\,\times\,12}\) ⇒ x = \(\frac{24\,\times\,4900}{140}\) = Rs 840 |
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