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Chapter mensuration
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Lenght of the table top = 4 m
Breadth = 2 m 50 cm = (2 + 50/100) m
= 2 + 1/2 m = 5/2 m
Area of the top
= l×b
= 4 × 5/2 m² = 10 m²
Cost of polishing = ₹ 250 / m² × 10 m² = ₹ 2,500