Question

find the perimeter of the circle the redius is 4.2 cm

Answer 1

Radius of circle = 4.2 cm
Perimeter = 2pi r = 2× 22/7 × 4.2 = 26.4 cm ans.
Hope this is ur required answer.

Answer 2

Perimeter=circumference of circle
Soo circumference = 2pi r
Soo 2*22/7*4.2
26.4 is the answer