A circular park with 8 m diameter is surrounded by a 0.5 m wide path. What is the percentage increase in area?

उत्तर दाखवा आणि स्पष्टीकरण

उत्तर: (C) 26.56%

स्पष्टीकरण

(4.5² − 4²)/4² = 4.25/16 = 26.56%.