The outer edge of a circular running track is 330 m long. If it ins widened by 7m is around, find the cost of widening it at ₹8 per metre
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2*22/7*r = 330
22/7*r = 330/2 = 165
r/7 = 165/22 = 15/2 = 7.5
r = 7.5*7 = 52.5
52.5 + 7 = 59.5 = new radius
new circumference = 2*22/7*59.5 = 374
374 - 330 = 44
total cost = 44*8
= 352
22/7*r = 330/2 = 165
r/7 = 165/22 = 15/2 = 7.5
r = 7.5*7 = 52.5
52.5 + 7 = 59.5 = new radius
new circumference = 2*22/7*59.5 = 374
374 - 330 = 44
total cost = 44*8
= 352
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