Question

the circumfrance of a circle 45 cm what is length of its diameter

Answer 1

Answer:

The Diameter of the Circle is 14.32 cm

Step-by-step explanation:

We Have :-

Circumference / Perimeter of the Circle = 45 cm

To Find :-

Diameter of the circle

Formula Used :-

Perimeter of Circle =

$2 \: \pi \: r$

Solution :-

$perimeter \: = \: 2 \: \pi \: r \\ \\ 45 \: = \: 2 \: \pi \: r \\ \\ \pi \: r \: = \: \dfrac{45}{2} \\ \\ r \: = \: \dfrac{45}{2 \: \pi} \\ \\ r \: = \: \dfrac{45 \times 7}{2 \times 22} \: \: \: \: ( \: value \: of \: \pi \: = \: \dfrac{22}{7} \: ) \\ \\ r \: = \: 7.16 \: cm \\ \\ so \: \: \: \: \: \: \: diameter \: = \: 2 \: r \\ \\ d \: = \: 2 \times 7.16 \\ \\ d \: = \: 14.32 \: cm$

Answer 2

> length of its diameter is 14.31cm is the required answer

✯ Correct Question ✯

• The circumfrance of a circle 45 cm what is length of its diameter

✯ Given ✯

• circumfrance of a circle 45 cm

✯ To find ✯

• length of its diameter ?

✯ Approach ✯

• We will apply the formula and find it's radius
• then, from radius we will drive it's diameter

✯ Formula ✯

• Circumference of a circle = (2 π r)
• Diameter = 2 r

✯ Assumption ✯

• we will assume,
• Let, the radius be r

✯ Solution ✯

• it is given that,
• Circumference of circle is 45cm

Therefore,

=> 45 = 2 π r

=> 45 = 2 x 22/7 x r

=> r = 45/2 x 7/22

=> r = 7.15 cm

Hence,

Diameter = 2 x r = 2 x 7.15 = 14.31cm