Question

A circular track of width 2m is laid outside a cicular park of radius 18m. If the cost of laying the path is rs 8000/ square meter , find the total cost involved in laying the path.

Answer 1

Answer:

Rs 1910880

Step-by-step explanation:

width of track = 2m

radius of park = 18m

total radius including the track = 18 + 2 = 20m

area of park including the track = 22/7 * 20²

                                                     = 1257.14 m²

area of park excluding the track = 22/7 * 18²

                                                      = 1018.28 m²

area of the track = 1257.14 -1018.28

                            = 238.86 m²

rate of laying the path = 8000/m²

total cost = 238.86 * 8000 = Rs. 1910880