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There is a rectangular Garden whose length and width are 60m X 20m.There is a walkway of uniform width around garden. Area of walkway is 516m^2. Find width of walkway

1/2/3/4

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Let the width of the the walkway be x

Area of the outer rectangle will be (60+2*x) * (20+2*x)....(As length and width will get increased by 2*x)

Area of inner rectangle =60*20=1200

(60+2*x) * (20+2*x) -1200=516

(60+2*x) * (20+2*x) =1716

x2 + 40*x -129=0

Rejecting the negative value ,we get x=3

So answer is 3

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