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Question
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | ...... | 72.6 cm |
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Solution
| Radius (r) | Diameter (d) | Circumference (c) |
| 11.55 cm | 23.1 cm | 72.6 cm |
Explanation:
Circumference, c = 72.6 cm
Now,
c = 2πr ...(where 'r' is the radius)
⇒ 72.6 = `2xx22/7xx"r"`
⇒ r = `72.6xx1/2xx7/22`
⇒ r = `(72.6xx7)/(2xx22)`
⇒ r = `508.2/44`
⇒ r = 11.55
So, radius = 11.55 cm
Diameter, d = 2r
= 2 × 11.55
= 23.1 cm
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