Learning task 3
1. A = π r³
= 3.14 × ( 32 cm)³
= 3.14 × 1,024
= 3,215.36 cm³
Answer: 3,215.36 cm³
2. A = π r³
= 48 ÷ 2 × 24 × 3.14
= 1,808.64
Answer: 1,808.64 m³
3. A = π r³
= 3.14 × ( 0.35m)³
= 3.14 × 0.1225 m³
= 0.38465 m³
Answer: 0.38465 m³
4. A = π r³
= 35.2 ÷ 2 × 17.6 × 3.14
= 972.6464 cm³
Answer: 972.6464 cm³
5. A = π r²
C = 2 π r
A=C2
4π=100²
4·π≈795.77472
Learning task 4
= 3.14 × ( 5m)³
= 3.14 × 25m³
= 78.5 m³
A = π r³
= 3.14 × (70 m)³
= 3.14 × 4,900 m³
= 15,386 m³
Add all the area
78.5 m³ + 15,386 m³
Answer: 15,464.5
= 3.14 × ( 4.5 m)³
= 3.14 × 20.25 m³
= 63.585 m³
Answer: 63.585 m³
= 150 cm ÷ 2 × 75 × 3.14
= 17,662.5 cm³
Answer: 17,662.5 cm³
= 3.14×(48dm)³
= 3.14× 2,304dm³
= 7,234.56 dm³
A=C²
4π=75²
4·π≈447.62328
Copyright © 2024 EHUB.TIPS team's - All rights reserved.
Answers & Comments
Learning task 3
1. A = π r³
= 3.14 × ( 32 cm)³
= 3.14 × 1,024
= 3,215.36 cm³
Answer: 3,215.36 cm³
2. A = π r³
= 48 ÷ 2 × 24 × 3.14
= 1,808.64
Answer: 1,808.64 m³
3. A = π r³
= 3.14 × ( 0.35m)³
= 3.14 × 0.1225 m³
= 0.38465 m³
Answer: 0.38465 m³
4. A = π r³
= 35.2 ÷ 2 × 17.6 × 3.14
= 972.6464 cm³
Answer: 972.6464 cm³
5. A = π r²
C = 2 π r
A=C2
4π=100²
4·π≈795.77472
Learning task 4
1. A = π r³
= 3.14 × ( 5m)³
= 3.14 × 25m³
= 78.5 m³
A = π r³
= 3.14 × (70 m)³
= 3.14 × 4,900 m³
= 15,386 m³
Add all the area
78.5 m³ + 15,386 m³
Answer: 15,464.5
2. A = π r³
= 3.14 × ( 4.5 m)³
= 3.14 × 20.25 m³
= 63.585 m³
Answer: 63.585 m³
3. A = π r³
= 150 cm ÷ 2 × 75 × 3.14
= 17,662.5 cm³
Answer: 17,662.5 cm³
4. A = π r³
= 3.14×(48dm)³
= 3.14× 2,304dm³
= 7,234.56 dm³
5. A = π r²
C = 2 π r
A=C²
4π=75²
4·π≈447.62328