Answer:
36.8
Shorter through the park
Step-by-step explanation:
Length of the bold line:
sqrt(15² + 27²)
3sqrt(106)
sqrt[(3sqrt(106))/2]² + 10²
sqrt(338.5)
18.39836949
36.79673899
36.79673899 < 15 + 27
36.79673899 < 42
