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primary 6 | Maths
| Measurement
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I need help with question b.
Thank you
Date Posted: 6 months ago
Views: 73
1080÷2 = 540
(a)
W = 540÷3 = 180
L = 2×180 = 360
360÷60=6
180÷60=3
2×(6+3)+4 = 22 (Ans)
(b)
360×180=64800
(360+120)×(180+120)=144000
144000-64800 = 79200
79200 - 22×π×30²
=16996.47 cm² (Ans)
or
2×60×(360+2×60) - 2×(2+6)×π×30²
= 12361.07
2×60×180 - 2×3×π×30²
= 4635.40
12361.07+4635.40
= 16996.47 cm² (Ans)
(a)
W = 540÷3 = 180
L = 2×180 = 360
360÷60=6
180÷60=3
2×(6+3)+4 = 22 (Ans)
(b)
360×180=64800
(360+120)×(180+120)=144000
144000-64800 = 79200
79200 - 22×π×30²
=16996.47 cm² (Ans)
or
2×60×(360+2×60) - 2×(2+6)×π×30²
= 12361.07
2×60×180 - 2×3×π×30²
= 4635.40
12361.07+4635.40
= 16996.47 cm² (Ans)
Thank you
See 1 Answer
done
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This is part b :)
Date Posted:
6 months ago
Thank you
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