Question

the cost of fencing a circular feild at the rate of rupees per meter is 5280.the feild is to be ploughed at the rate of rupees 0.50 per m² .find the cost of ploughing the feild​

Answer 1

Answer:

Step-by-step explanation:

For Rs. 24 , the length of fencing =1m

For Rs. 5280, the length of fencing =   5280 = 220 metres.

Circumference of the field = 220 m

2pr =220

2x  r =220  

Area of the field =   r2 =   (35)2 =1225 m2

Cost of ploughing = Rs. 0.50 per m2

Total cost of ploughing the field = Rs. 1225  x 0.50

= Rs. 1925

Answer 2

Answer:

Rate × Circumference = Cost

24 × 2πr =5280

$r = \frac{5280}{24} \times \frac{7}{2 \times 32}$

= 35cm

$area \: of \: circle = { \gamma r}^{2} \\ \frac{22}{7} \times 35 \times 35 \\ = 3850$

cost = Rate × Area

=0.5 × 3850

= 1325

Step-by-step explanation:

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