Answer:
20 yards
Explanation:
If you walked along the streets it would be 30 yards + 40 yards = 70 yards.
However, to calculate the length across the diagonal, we have to use the Pythagorean Theorem,
, where:
are sides, and
is the hypotenuse.
In this case,
,
, and
is the hypotenuse, which is the length we have to calculate.
So:




Finally, we subtract the 2 lengths,
, which gives us the difference, which is the amount of yards Carla will save.