Question

In a circle of diameter 42cm,if an arc subtends an angle of 60˚ at the centre

where ∏=22/7, then what will be the length of arc.​

Answer 1

Given:-

dimeter = 42cm

angle (θ) = 60 degree

π = 22/7

To find :-

length of an arc:- ?

Solution:-

As we know that

⇒ $l = r * \theta$

(where θ should be in radian.)

so, by putting all given value in thise above example:

We get,

⇒ $l = 21 * 60 * \frac{\pi}{180}$

⇒ $l = 21 * \frac{\pi}{3}$

⇒ $l = \frac{21}{3} * \frac{22}{7} ----( as it is given tha \pi = \frac{22}{7} )$

⇒ $l = 22\: cm$

therefore :-

length of an arc is 22 cm...

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