Q11. The cost of fencing a circular field at the rate of Rs.18 per metre is Rs. 3960.
The field is to be levelled at the rate of Rs. 6 per square metre. Find the total cost
of leveling the field.
(5m)
Answers
Answer:
Step-by-step explanation:For Rs.24, then length of fencing =1m
For Rs.52 so, the length of fencing
=
24
1
×5280=220meters
Circumference of the field =220m
2pr=220
Therefore r=
44
220×7
=35m
Area of the field =πr
2
π(35)
2
=1225
Cost of ploughing =Rs.0.50 per m
2
Total cost of ploughing the field =Rs.1225
=
7×2
1225×22×1
=Rs,1925.
7th
Maths
Perimeter and Area
Perimeter and Area of a Circle
The cost of fencing a circu...
MATHS
The cost of fencing a circular field at the rate of Rs.24 per metre is Rs.5280. The field is to be ploughed at the rate of Rs. 1.5 per sq.m. Find the cost of ploughing the field.
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ANSWER
For Rs.24, then length of fencing =1m
For Rs.52 so, the length of fencing
=
24
1
×5280=220meters
Circumference of the field =220m
2pr=220
Therefore r=
44
220×7
=35m
Area of the field =πr
2
π(35)
2
=1225
Cost of ploughing =Rs.0.50 per m
2
Total cost of ploughing the field =Rs.1225
=
7×2
1225×22×1
=Rs,1925.
Hence, the answer is 1925.