1. LO = πr²
= 22/7 x 3.5 x 3.5
= 22/2 x 3.5
= 11 x 3.5
= 38.5 (C)
2. LO = πr²
= 22/7 x 21 x 21
= 22 x 3 x 21
= 1386 (B)
3. LO = πr²
= 3.14 x 6 x 6
= 3.14 x 36
= 113.04 (C)
4. LO = πr²
= 3.14 x 5 x 5
= 3.14 x 25
= 78.5 (B)
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1. LO = πr²
= 22/7 x 3.5 x 3.5
= 22/2 x 3.5
= 11 x 3.5
= 38.5 (C)
2. LO = πr²
= 22/7 x 21 x 21
= 22 x 3 x 21
= 1386 (B)
3. LO = πr²
= 3.14 x 6 x 6
= 3.14 x 36
= 113.04 (C)
4. LO = πr²
= 3.14 x 5 x 5
= 3.14 x 25
= 78.5 (B)