Question:
The cost of 140 tennis balls is Rs 4900. Find the cost of 2 dozen such balls.
Solution:
Let Rs x be the cost of 24 tennis balls.
More tennis balls will cost more.
Now, $\frac{140}{4900}=\frac{24}{x}$
$\Rightarrow x=\frac{24 \times 4900}{140}$
$\Rightarrow x=840$
∴ The cost of 2 dozen tennis balls is Rs 840.
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