Question

The perimeter of a quadrant of a circle of radius 3.5 cm is​

Answer 1

Step-by-step explanation:

Perimeter = arc +2×radius

$\frac{1}{4} \times 2\pi \: r + 2 \times 3.5 \\ \frac{1}{4} \times 2 \times \frac{22}{7} \times 3.5 + 7 \\ 11 \times 0.5 + 7 \\ 5.5 + 7 \\ = 12.5cm$

Answer 2

Step-by-step explanation:

Given:-

Radius of the circle (r)= 3.5cm

radius of the quadrant (r)=3.5 cm

perimeter of a quadrant= 2r + πr/2

= 2 X 3.5cm + ²²/⁷ X 3.5/2

= 7cm + 11cm/2

= 14+11cm/2

=25cm/2 or 12.5 cm