Question

in a circle of radius 10.5 cm, an arc subtends an angle of 60degree at the centre. Find the length of the arc

Answer 1

length of the arc = ∅÷360°×2×pi×r
                           =60÷360°× 2×22÷7×10.5
                             =22÷7×3.5
                              =77÷7
                               =11cm
thus, u get the answer for it and your answer is 11cm

Answer 2

The length of the arc is 11 cm

Given :

The radius (r) = 10.5 cm

The angle at the center (θ) = 60°

To find :

The length of the arc (l)

Solution :

The radius (r) = 10.5 cm

The angle at the center (θ) = 60°

We know that,

The length of the arc = 2πr(θ/360°)

                                 l = 2*22/7*10.5*60/360

                                 l  = 77/7

                                l   = 11 cm

Therefore, the length of the arc (l) is 11 cm

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