The inner circumference of a circular path enclosed between two concentric circles is 264m. The uniform width of the circular path is 3m. What is the area (in m2), to the nearest whole number of the path? (Take Π = )
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 820
Formula used:
Circumference of circle = 2πr
Area of circle = πr2
Calculations:
According to the question:
⇒ 2πr = 264
⇒ r = 264/2π
⇒ 42 m
As we know that, width is 3 m
So the outer radius is = 42 + 3 = 45 m
Area of circular path = π(452 - 422)
⇒ π(261) = 820.28 820 m2.