Consider a triangle with sides 3,6,8 cm respectivelty.Now if a man runs around the triangle in such a way that he is always at a distance of 1cm from the sides of triangle then how much distance will he travel.

Now exact length of the outer triangle cannot be find out because of the rounded edges but approx length can be,

So now the length of new circle that is approx will increase by 2 cm because of 1 cm increase in both the sides so,

side will be 3+2 cm, 6+2 cm , 8+2 cm or 5, 8, 10 cm .

So length covered = 5+8+10=23 cm approx.

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