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primary 6 | Maths
| Percentage
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Date Posted: 2 years ago
Views: 328
(a)
r → radius of circle
X = square = 2r²
Y = circle = πr²
X+Y = r² × (3.14+2) = 200.96
r = √(200.96÷5.14)
≈ 6.25 cm (Ans)
(b)
√X
= √2 r
≈ 8.84 cm (Ans)
(c)
▲BCD
= 200.96÷5.14
≈ 39.097 cm² (Ans)
r → radius of circle
X = square = 2r²
Y = circle = πr²
X+Y = r² × (3.14+2) = 200.96
r = √(200.96÷5.14)
≈ 6.25 cm (Ans)
(b)
√X
= √2 r
≈ 8.84 cm (Ans)
(c)
▲BCD
= 200.96÷5.14
≈ 39.097 cm² (Ans)
See 1 Answer
Use π
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