Question

a circular path 3.5m wide surrounds a circular lawn of circumference 264m the fost of paving the path at rs 10 per metre square​

Answer 1

Answer:

9625 Rs

Step-by-step explanation:

area of the path = outer circle - inner circle

circumference of the inner circle = 2πr = 264 m

radius of inner circle:-

  2 × 22/7 × r = 264

  r = 264 × 7/ 2 × 22

  r = 264 ×7/ 44

  r = 42

area of the inner circle = πr²

22/7 × 42 × 42

= 5544 m²

radius of the outer circle = 42 + 3.5

                                                = 45.5

area of the outer circle =

22/7 × 45.5 × 45.5

= 6506.5 m²

area of the path = 6506.5 - 5544

       = 962.5 m²

cost per one m = 962.5 × 10

                              = 9625 Rs