Question

7. The perimeter of a circle of diameter 10 cm is-

(a) 30.4 cm. (b) 30.14 cm
(c) 31.4 cm. (d) 30.01 cm.
(Take π = 3.14)​

Answer 1

Solution -:

`\qquad\qquad\qquad\boxed{\bf\:\:{(c) \: 31.4 \: cm \: ans \: }}`

Explanation -:

The diameter is = 10 cm

( Take π = 3.14 )

`\\ \: \tt :\implies \: 10 \: * 3.14 \\ \\ 31.4 \: ans`

More Information -:

• Area of circle= πr²

• Circumference= 2 πr

• π = 22/7 or 3.14 ( approx )

• Annulas = π(R² - r ²)