Question

A circular pond is of diameter 17.5 metre it is surrounded by a 2 metre wide path find the cost of constructing the path at the rate of 25 rupees per metre square used by 3.14

Answer 1

Answer:

Rs 3000 may be the answer

Answer 2

$Given \: \: \: \: radius(r)= \: \frac{17.5}{2} m$

and width of the path(w)=2m

$Area \: \: of \: \: path=\pi( {R}^{2} - {r}^{2} )$

$R=r+ω= \frac{17.5}{2} +2=10.75 \: m$

$∴Area= \: 3.14( {10.75}^{2} - {8.75}^{2} )$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 122.46 \: \: {m}^{2}$

Cost of construction,

= Rs. 122.46 × 25

$\boxed{ = Rs. \: \: 3061.5} \: answer \:$