Answer:
1. A= pi x r²
= 3.14 x 35²
= 3.14 x 1225
= 3846.5cm²
A=pi x r²
= 3.14 x (80÷2)²
= 3.14 x 1600
= 5024cm²
A= 2(5024) + 3846.5
= 10048 + 3846.5
= 13894.5
2. C= 2pi×r
= 6.28×(70÷2)
= 6.28 x 35
= 219.8cm
3. A=pi x r²
4. 70:80
= 70÷10: 80÷10
= 7:8
5. A = l x w
= 300 x 120
= 36000cm²
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Answers & Comments
Answer:
1. A= pi x r²
= 3.14 x 35²
= 3.14 x 1225
= 3846.5cm²
A=pi x r²
= 3.14 x (80÷2)²
= 3.14 x 1600
= 5024cm²
A= 2(5024) + 3846.5
= 10048 + 3846.5
= 13894.5
2. C= 2pi×r
= 6.28×(70÷2)
= 6.28 x 35
= 219.8cm
3. A=pi x r²
= 3.14 x (80÷2)²
= 3.14 x 1600
= 5024cm²
4. 70:80
= 70÷10: 80÷10
= 7:8
5. A = l x w
= 300 x 120
= 36000cm²