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Mathetics - the science of learning

by Roubina
(Pakistan)











































cost of polishing

The approximate cost of polishing the table shown below, with semi-circular ends, at the rate of Rs. 5 per square meter in rupees?

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Jan 08, 2014
cost of polishing a table
by: Staff


Answer

Part I


table with semicircular ends





the cost of polishing the table = area of table in square meters * Rs. 5 per square meter



formula for calculating the cost of polishing the table








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Jan 08, 2014
cost of polishing a table
by: Staff


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Part II



area of table


area of table = area of center rectangle + area of right end + area of left end


formula for calculating the area of the table





center of center rectangle:

Area center rectangle = length * width

Area center rectangle = 12 meters * 4 meters

Area center rectangle = 48 meters2



the area of the center rectangle of the table








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Jan 08, 2014
cost of polishing a table
by: Staff


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Part III


both table ends:

Area = pi * r2

Area = 3.14159 * 22


Area = 12.56636 meters2



right semi-circular table end





area of right semi-circular table end







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Jan 08, 2014
cost of polishing a table
by: Staff


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Part IV



left semi-circular table end






area of left semi-circular table end








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Jan 08, 2014
cost of polishing a table
by: Staff


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Part V


area of entire table = center rectangle + both table ends

area of entire table = 48 meters2 + 12.56636 meters2

area of entire table = 60.56636 meters2



calculating the total area of the table





cost of polishing = (Rs. 5 per square meter) * 60.56636 meters2

cost of polishing = Rs. 302.8318



calculating the cost of polishing the table







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Jan 08, 2014
cost of polishing a table
by: Staff


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Part VI



final cost of polishing the table








Thanks for writing.

Staff
www.solving-math-problems.com


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