Question

If angle of sector is 60°, radius is 3.5 cm then length of the arc is ____________.

विकल्प

• 3 cm

• 3.5 cm

• 3.66 cm

• 3.8 cm

Answer 1

If angle of the sector is 60°, the radius is 3.5 cm then the length of the arc is 3.66 cm.

Explanation:

Here r `= 3.5  "cm" = 35/10 = 7/2  "cm"  theta = 60^circ` 

Length of arc `= theta/360 xx 2 pi "r"`

`= 6/360 xx 2 xx 22/7`

`= 7/2 xx 1/6 xx 22`

`= 3.66  "cm"`