In this page length of arc question4, we are going to see quiz on the topic length of arc. First we are going to see solution of question 4.

**Length of arc = (θ/360) x 2Πr**

here θ - angle formed by two radius

r - radius

**Question 4 :**

Find the length of arc whose radius is 10.5 cm and central angle is 36°

**Solution :**

Length of arc = (θ/360) x 2 Π r

Here central angle (θ) = 36° and radius (r) = 10.5 cm

= (36°/360) x 2 x (22/7) x 10.5

= (1/10) x 2 x (22/7) x 10.5

= (1/5) x (22/7) x 10.5

= (22/7) x 2.1

= 22 x 0.3

= 6.6 cm

Hence, the length of arc = 6.6 cm

(1) Find the length of arc whose radius is 42 cm and central angle is 60°

(2) Find the length of arc whose radius is 21 cm and central angle is 120°

(3) Find the length of arc whose radius is 35 cm and central angle is 72°

(4) Find the length of arc whose radius is 10.5 cm and central angle is 36°

(5) Find the length of arc whose radius is 14 cm and central angle is 5°

(6) Find the length of arc whose radius is 28 cm and central angle is 90°

(7) Find the length of arc whose radius is 14 cm and central angle is 288°

(8) Find the length of arc whose radius is 10.5 cm and central angle is 45°

(9) Find the length of arc whose radius is 35 cm and central angle is 18°

(10) Find the length of arc whose radius is 21 cm and central angle is 30°

- Solution for length of arc question 1
- Solution for length of arc question 2
- Solution for length of arc question 3
- Solution for length of arc question 4
- Solution for length of arc question 5
- Solution for length of arc question 6
- Solution for length of arc question 7
- Solution for length of arc question 8
- Solution for length of arc question 9
- Solution for length of arc question 10

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