Question

The length of a pencil is 10 cm and its radius is 2 cm. Find the ratio of its length to its 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 = 10 cm

Radius of the pencil = 2 cm ; Hence diameter = 2 $\times$ 2 = 4 cm

Ratio of the length of the pencil to its diameter = 10 : 4

= $\frac{10}{4}$

= $\frac{5}{2}$ = 5 : 2

Hence, ratio of its length to diameter = 5 : 2