1. V = π×r²×t
= 22/7 × 7×7 × 19
= 2.926 cm³
2 V = π×r²×t
= 22/7 × 7×7 ×21
=3.234 cm³
3. V = π×r²×t
= 3,14 × 10×10 ×18
= 5.652 cm³
4. V = π×r²×t
= 3,14 × 20×20 ×15
= 18.840 cm³
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Verified answer
1. V = π×r²×t
= 22/7 × 7×7 × 19
= 2.926 cm³
2 V = π×r²×t
= 22/7 × 7×7 ×21
=3.234 cm³
3. V = π×r²×t
= 3,14 × 10×10 ×18
= 5.652 cm³
4. V = π×r²×t
= 3,14 × 20×20 ×15
= 18.840 cm³