Question

What is the cost of painting the circular ground of radius 21 with three rounds of wire if the wire cost rupees 60 per metre?

1. 23760
2. 23740
3. 22760
4. 22740​

Answer 1

Answer:

2.23749 l hope that answer will help you

Answer 2

Answer:

1. 23760

Step-by-step explanation:

$perimeter \: to \: be \: painted \: of \: the \: \\ circular \: ground \: = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 21 = 132 \\ cost \: of \: painting \: once = 60 \times 132 \\ = 7920 \\ cost \: of \: painting \: thrice = 3 \times 7920 \\ = 23760$