Question

In a building there are20 pillars the radius of each pillar is 50cm and height is4m Find the cost of painting at the rate of 25rs/metre square

Answer 1

THANKS FOR THE QUESTION !

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GIVEN :

=> THERE ARE 20 PILLERS

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DIMENSIONS OF A PILLER :

=> RADIUS ;

=> 50 CM

=> 0.5 M

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HEIGHT OF A PILLER ,

=> 4M

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=> PILLER MEANS LIKE A CYLINDER

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TO FIND :

=> THE COST OF PAINTING THE PILLERS

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FOR ONE PILLER ,

=> THE TOTAL SURFACE AREA FOR PAINTING :

=> CURVED SURFACE AREA OF CYLINDER

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FORMULA FOR CURVED SURFACE AREA OF CYLINDER :

=> 2 * π * R * H

=> 2 * 22 / 7 * 0.5 M * 4 M

=> 44 / 7 * 0.5 * 4

=> 44 * 2 / 7

=> 88 / 7

=> 12.571 M^2 ...

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AREA FOR 20 SUCH PILLERS :

=> 20 * AREA FOR 1 PILLER :

=> 20 * 12.571 M^2

=> 251.42 M^2

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COST OF PAINTING :

=> 25 RS PER M^2 AREA

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COST :

=> 25 * 251.42

=> 6285.5 RS

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HOPE IT WILL HELP U .....

THANKS AGAIN .......

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