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secondary 2 | Maths
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secondary 2 chevron_right Maths chevron_right Singapore

need help with b only
teach how to do oso

Date Posted: 4 years ago
Views: 299

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AC Lim
Ac Lim's answer
12614 answers (A Helpful Person)
1st
Hope answer is correct.
Eric Nicholas K
Eric Nicholas K
4 years ago
I doubt the surface area of the bollard involves the bottom circular surface, since the question asks for the sides and the top. I presume that a typical bollard is designed to be placed on the ground such that the bottom surface is not exposed to the surroundings. Typical example of bollards include those near traffic light designated crossing areas.
AC Lim
AC Lim
4 years ago
Thanks Eric,
Think your point is correct. I have doubts when question mentioning area of the sides and top of bollards. I understand the meaning now :)

Answer for b) surface area should be 8014..19 cm^2. Shouldn’t include the base circular area (pixr^2=797.14).
LockB
LockB
4 years ago
thx!!
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AC Lim
Ac Lim's answer
12614 answers (A Helpful Person)
Correction