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प्रश्न
To find the distance around a circular disc, multiply the diameter of the disc by 3.14. What is the distance around the disc when the radius is 6.45 cm?
उत्तर
Given,
Distance around a circular disc = Diameter of disc × 3.14
The radius of disc = 6.45 cm
Diameter of disc = 2 × Radius of disc = 2 × 6.45 = 12.9 cm
Distance around a circular disc = 12.9 × 3.14 = 40.506 cm
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