In a Circle of Diameter 42cm ,If an arc Subtends an Angle of 60 ˚ at the Centre Where ∏=22/7,then the Length of the Arc is - Bzziii
In a circle of diameter 42cm ,if an arc subtends an angle of 60 ˚ at the centre where ``\pi`=`22/7`,then the length of the arc is
(a) 22/7 cm
(b) 22 cm
(c) 44 cm
(d) 11cm
(b) 22 cm
Explanation:
Length of Arc APB = `\frac{\theta}{360}``\times``(2\pi "r")`
= `\frac{60}{360}``\times` 2 `\times` `22/7``\times` 21
= `1/6` `\times` 2`\times` `22/7` `\times` 21
= 22 cm
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