A diagonal walk through a small rectangular garden 9 meters by 12 meters can be built at $10 per linear mete?

Answer 1

a^2 + b^2 = c^2

where c = the diagonal walk

9^2 + 12^2 = c^2

c= square root of (81+144)

c= 15 meters

amount needed to build the fence: 15 meters * $10 per meter = $150

Answer 2

by pythagoras, the diagonal is 15 metres, so would cost $150.