Question 186421
You an use the Pythagorean theorem to solve this problem by first finding the length of the diagonal (hypotenuse) of the right triangle formed by two adjacent sides (legs) of the rectangular garden.
{{{c^2 = a^2+b^2}}} where c = the hypotenuse (diagonal), a = 9 meters and b = 12 meters.
{{{c^2 = 9^2+12^2}}}
{{{c^2 = 81+144}}}
{{{c^2 = 225}}} Take the square root of both sides.
{{{c = 15}}}
So the length of the diagonal walk is 15 meters and the cost (C), at $10 per linear meter will be:
{{{C = 15*10}}}
{{{C = 150}}}
The walk will cost $150.00