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How many tiles each of area 400 cm squared , will need to pave a footpath  which is 2m wide and surrounds a grass plot 25m longand 13m wide ? pllease reply fast.

Asked by archana 7th January 2017, 8:21 PM
Answered by Expert
Answer:
begin mathsize 16px style Length space of space the space plot space equals space 25 space straight m comma space
Breadth space of space the space plot space equals 13 space straight m space
Area space of space the space rectangular space plot space equals space 25 space straight m space cross times space 13 space straight m space equals 325 space sq. straight m. space
Length space of space outside space rectangle space equals space 25 plus 2 plus 2 equals 29 space straight m comma space
Breadth space of space outside space rectangle space equals 13 plus 2 plus 2 equals 17 space straight m space
Area space of space outside space rectangle space equals 29 space straight m space cross times 17 space straight m space equals space 493 space sq. straight m. space
Area space of space foot space path space equals space 493 space minus space 325 space equals space 168 space sq. straight m. space equals 1680000 space sq. cm. space
Area space of space the space square space tile space equals space 400 space sq. space cm
Number space of space tiles equals 1680000 over 400 equals 4200 end style
Answered by Expert 8th January 2017, 6:12 PM
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