Question

Find the approximate circumference of a circle whose radius is 1.5

cm.
notice
that's of class5th​

Answer 1

Answer:

• Circumference of a circle is 9.4 cm.

Step-by-step explanation:

Given that:

• Radius of a circle = 1.5 cm

To Find:

• Circumference of a circle.

Formula used:

• Circumference of a circle = 2π × (radius)

Finding the circumference of a circle:

Circumference of a circle = 2π × (1.5)

Circumference of a circle = (2 × 22 × 1.5)/7

Circumference of a circle = (66)/7

Circumference of a circle = 9.4285

Approximate Circumference of a circle ≈ 9.4 cm

Answer 2

Answer:

Given :-

• A circle whose radius is 1.5 cm.

To Find :-

• What is the approximate circumference of a circle.

Formula Used :-

$\sf\boxed{\bold{\pink{Circumference\: of\: Circle =\: 2{\pi}r}}}$

where,

• r = Radius

Solution :-

Given :

• Radius = 1.5 cm

According to the question by using the formula we get,

↦ $\sf Circumference\: of\: Circle =\: 2 \times \dfrac{22}{7} \times 1.5$

↦ $\sf Circumference\: of\: Circle =\: \dfrac{44}{7} \times \dfrac{15}{10}$

↦ $\sf Circumference\: of\: Circle =\: \dfrac{44 \times 15}{7 \times 10}$

↦ $\sf Circumference\: of\: Circle =\: \dfrac{66\cancel{0}}{7\cancel{0}}$

↦ $\sf Circumference\: of\: Circle =\: \dfrac{66}{7}$

➠ $\sf\bold{\red{Circumference\: of\: Circle =\: 9.42}}$

$\therefore$ The approximate circumference of a circle is 9.42 cm.