7. TBQ - Evaluate the area

The sides of a triangle are in the ratio 4 \(:\) 7 \(:\) 9 and its perimeter is 80 \(cm\). Estimate the area of the triangle. (Use \(\sqrt{5} = 2.24\))
 
Area of the triangle \(=\) \(cm^2\).
 
[Note: Round off your answer to two decimal places.]
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