the radius of a field in the form of sector is 21m the cost of the constructing a wall around the field is a ₹1875 of the rate of₹25 per meter if it costs ₹10 of per m2 to till the field what will be the cost of the tilling the whole field
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25 costs for 1 m
1875 costs for=1875/25=75m
Theta/360×2piR=75
Theta/360=75×7/2×22×21=25/44
Area of sector=theta /360×pi×r sq
=25/44×22/7×21×21=1575/2 sq m
1 sq m=10
1575/2 sq m=10×1575/2=1575×5=Rs 7875
1875 costs for=1875/25=75m
Theta/360×2piR=75
Theta/360=75×7/2×22×21=25/44
Area of sector=theta /360×pi×r sq
=25/44×22/7×21×21=1575/2 sq m
1 sq m=10
1575/2 sq m=10×1575/2=1575×5=Rs 7875
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