Question

find the length of the diameter of the circle whose circumference is 8.8cm
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Answer 1

Answer

diameter = 2.8 cm

Step-by-step explanation:

circumference = 8.8cm

2πr = 8.8cm

2*22/7*r = 8.8

44/7*r = 8.8

r = 8.8*7/44

r = 1.4cm

r =1.4

diameter = 1.4*2

= 2.8 cm

Answer 2

Given:

☞ Circumference = 8.8 cm

To find:

➳ Length of diameter = ?

Method:

Circumference = 2 π r

✍ Substitute value of circumference in above formula.

⇒ 8.8 = 2 π r

Divide by 2 on both sides.

⇒ 4.4 = π r

⇒ 4.4 ÷ π = r

$\implies \sf{4.4 \times \frac{7}{22} = r } \\ \\ \implies \sf{radius = 1.4 \: cm} \\ \\ \\ \bf{diameter = 2 \times radius } \\ \implies \sf {diameter = 2 \times 1.4} \\ \therefore \boxed{ \boxed{ \sf{diameter = 2.8 \: cm}}}$