Question

find the circumference of a circle whose : 1. radius is 35 cm 2. diameter is 42

Answer 1

Answer:

1. Approximately 220cm and 2. Approximately 132cm.

Step-by-step explanation:

1.

Diameter = 35cm * 2 = 70cm

Circumference = $\pi$ * Diameter = $\pi$ * 70cm = 219.911486cm... which is approximately 220cm.

2.

Diameter = 42cm

Circumference = $\pi$ * Diameter= $\pi$ * 42cm = 131.946891cm... which is approximately 132cm.

Answer 2

Answer:

Step-by-step explanation:

1. Circumference of a circle=2×22/7×35

=2×22×5

=220cm^2

2. Diameter=42cm

Hence, radius=42/2=21cm

Circumference=2×22/7×21

=2×22×3

=132cm^2