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secondary 3 | E Maths
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Ans is 14100 cm square and 21 pots. Pls help. Thanks
Date Posted: 3 years ago
Views: 406
Total surface area to be painted
= Top circle + bottom circle + curved surface
= pi r^2 + pi r^2 + 2 pi r h
= 2 pi r^2 + 2 pi r h
= 2 pi x 15^2 + 2 pi x 15 x 20
= 1050 pi
= (I not sure of the number as I have no calculator accessible to me currently, it’s around 3300)
Maximum number of cans painted
= (30 x 100 x 100) / (1050 pi)
= 300 000 / 3300
= ~ 90
= Top circle + bottom circle + curved surface
= pi r^2 + pi r^2 + 2 pi r h
= 2 pi r^2 + 2 pi r h
= 2 pi x 15^2 + 2 pi x 15 x 20
= 1050 pi
= (I not sure of the number as I have no calculator accessible to me currently, it’s around 3300)
Maximum number of cans painted
= (30 x 100 x 100) / (1050 pi)
= 300 000 / 3300
= ~ 90
Thanks Mr Eric.
See 1 Answer
done
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Date Posted:
3 years ago
Thanks a lot
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