Question

The lenth of a pencil is 18 cm and its diametre is 8 mm what is the ratio of diameter of the pencil to that of its length​

Answer 1

Answer:

• The ratio of diameter of the pencil to that of its length is 2 : 45.

Step-by-step explanation:

Given that:

• The length of a pencil is 18 cm.
• Its diameter is 8 mm.

To Find:

• The ratio of diameter of the pencil to that of its length.

First converting the length of pencil in mm:

We know that,

∵ 1 cm = 10 mm

∴ 18 cm = (10 × 18) = 180 mm

Finding the ratio of diameter of the pencil to that of its length:

⟶ Diameter : Length = 8 mm : 180 mm

Cancelling mm.

⟶ Diameter : Length = 8 : 180

⟶ Diameter : Length = (2 × 4) : (45 × 4)

Cancelling 4.

⟶ Diameter : Length = 2 : 45

∴The ratio of diameter of the pencil to that of its length = 2 : 45

Answer 2

Answer:

Given :

Length of a pencil = 18 cm

Diameter = 8 mm

To Find :

Ratio of diameter to length

Solution :

We are knowing that

1 cm = 10 mm

18 cm = 18 × 10 = 180 mm

Therefore

Ratio = 8:180

In simplest form

4:90

2:45