Question

The length of a pencil is 15 cm and its radius is 3 cm. Find the ratio of its length to diameter.

• A. 2:5
• B. 5:2
• C. 5:1
• D. 1:5

Answer 1

The correct option is B

5:2

Given the length of the pencil = 15 cm

Radius of the Pencil = 3 cm ; Hence Diameter = 2 $\times$ 3 = 6 cm

Hence ratio of the length of the pencil to length of its diameter = 15 : 6

= $\frac{15}{6}$

= $\frac{5}{2}$ = 5 : 2 ( Dividing by 3)

Hence ratio of its length to diameter = 5 : 2