a circular field of radius 41 M has a circular path of uniform width 5m along and inside its boundary find the cost of paving the path at rupees 25 per metre square
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radius of field = 41 M
circular path's radius = 5 m and it is inside the boundary.
the area of path = area of circular field- area of inner circle of radius 36 M =π 41*41 - π 36*36
= 22/7 (1681 - 1296) = 22/7 * 385 = 1210 square meters
cost of paving 1 square metre = rs 25
cost of paving 1210 square meters= 1210*25 = rs 30250
answer
circular path's radius = 5 m and it is inside the boundary.
the area of path = area of circular field- area of inner circle of radius 36 M =π 41*41 - π 36*36
= 22/7 (1681 - 1296) = 22/7 * 385 = 1210 square meters
cost of paving 1 square metre = rs 25
cost of paving 1210 square meters= 1210*25 = rs 30250
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