Answer:
1. 131.88cm²
2. 314m²
3. 34m²
4. 486cm²
5. 87m²
Step-by-step explanation:
1. L.A.= 2πrh
= 2(3.14)(3cm)(4cm)
= 6.28×12
= 75.36cm²
S.A.= L.A. + 2B
= L.A. + 2πr²
= 75.36 + 2(3.14×3×3)
= 75.36cm² + 56.52cm²
= "131.88cm²"
2. S.A.= 4πr²
= 4×3.14×5×5
= 12.56×25m²
="314m²"
3. S.A.= 2(2×1) + 2(1×5) + 2(2×5)
= 4+10+20
="34m²"
4. L.A.= s² or s×s
= 9×9
= 81cm²
S.A. = 6(L.A.) or 6×s²
= 6(9cm×9cm)
= "486cm²"
5. L.A.=perimeter of the base × height
=(3+3+3)×6
= 9×6
=54m²
S.A. = L.A. + 2B
= L.A. + 2(½.b.h)
= 54m² + 2(½×3×11)
= 54m²+2(16.5m²)
= 54m²+ 33m²
="87m²"
Explaination:
I (J)HOPE IT HELPS:)
Correct me if i'm wrong thank youuuuu;)
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Answers & Comments
Answer:
1. 131.88cm²
2. 314m²
3. 34m²
4. 486cm²
5. 87m²
Step-by-step explanation:
1. L.A.= 2πrh
= 2(3.14)(3cm)(4cm)
= 6.28×12
= 75.36cm²
S.A.= L.A. + 2B
= L.A. + 2πr²
= 75.36 + 2(3.14×3×3)
= 75.36cm² + 56.52cm²
= "131.88cm²"
2. S.A.= 4πr²
= 4×3.14×5×5
= 12.56×25m²
="314m²"
3. S.A.= 2(2×1) + 2(1×5) + 2(2×5)
= 4+10+20
="34m²"
4. L.A.= s² or s×s
= 9×9
= 81cm²
S.A. = 6(L.A.) or 6×s²
= 6(9cm×9cm)
= "486cm²"
5. L.A.=perimeter of the base × height
=(3+3+3)×6
= 9×6
=54m²
S.A. = L.A. + 2B
= L.A. + 2(½.b.h)
= 54m² + 2(½×3×11)
= 54m²+2(16.5m²)
= 54m²+ 33m²
="87m²"
Explaination:
I (J)HOPE IT HELPS:)
Correct me if i'm wrong thank youuuuu;)