Hi I need help. Only with (b) asap.

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primary 5 | Maths | Area & Volume
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primary 5 Maths Area & Volume Singapore

Hi I need help. Only with (b) asap.

Date Posted: 3 years ago

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Sstrike

3 years ago

(a)
# total → Sd:A:Sn = 4u:1u:2u
each → Sd:A:Sn = 3:8:12
# of cp total → Sd:A:Sn = 12u:8u:24u

# of cp total →
Sd:A = 12u:8u
= 3:2 (Ans)

Sn - A = 24u-8u = 16 units → 176

u = 176÷16 = 11

(b)
Sd+A+Sn
= 4u+1u+2u
= 7u = 7×11
= 77 (Ans)

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Date Posted: 3 years ago

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