Question

C =2 pie r

a) Find the value of C when t = 3.142 and r= 5

A = pie r squared
b) Find the value of A when pie= 3.142 and r = 5

Answer 1

Circumference, C is 31.42 units and Area, A is 78.55 sq. units

Explanation:

• Step 1: Find C when π = 3.142 and r = 5

C = 2πr = 2 × 3.142 × 5

= 31.42 units

• Step 2: Find A when π = 3.142 and r = 5

A = πr² = 3.142 × 5² = 3.142 × 25

= 78.55 sq. units