Question 1036699
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How many square titles of side 20 cm will be needed to pave a footpath which is 2 meters wide 
and surrounds a rectangular plot 40 m long and 22 m wide 
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Calculate the area of the pave as the difference


(40+4)*(22+4) - 40*20 square meters


and then divide it by the area of one tile which is 0.2*0.2 = 0.04 square meters.


<U>Answer</U>. 4600 tiles.