Calculate and correct to three significant figures, the length of an arc subtends an angle of 70

^{o}at the center of the circle radius 4cm. [Take π = 22/7]-
**A.**

2.44cm -
**B.**

4.89cm -
**C.**

9.78cm -
**D.**

25.1cm -
**E.**

50.3cm

##### Correct Answer: Option B

##### Explanation

Circumference of circle = 2πr = 2 x 3.14 x 4

= 25.1cm 360^{o} = 25.1cm

70

^{o}= 25.1360

x 70 = 4.89