Question

The diameter of a circular ground is 42 m. Find the cost of fencing it at the rate

of Rs. 90 per m. (Take Π = 22

7

​

Answer 1

Answer:

42×0+22

42×0

=0+22

=22 ANS

Answer 2

$diameter \: = \: 42$

$raius \: = 42 \div 2 = 21 \: cm$

$circumfrence \: of \: circle \: = \\ 2\pir \: r$

=2×22/7×21

=44×3

= 132 cm

cost of 1 fencing = Rs.90

Than cost of 132 cm = 90×132

= 11880 Rs.

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