find the area of the circle given that: (a) radiu-20cm (b) diameter- 42
Answers
Answered by
1
- Radius = 20 cm
Area = πr²
=> 22/7 × 20 ×20
=> 22/7 × 400
=> 1257.4 cm²
2. Diameter = 42 cm
Area = πr²
Radius = d/2
=> 42/2
=> 21
Area = 22/7 × 21 × 21
=> 22 × 3 × 21
=> 66 × 21
=> 1386 cm²
Hope it will help....
Answered by
0
Step-by-step explanation:
area of (a) = 2πr
=2×3.14×20
=125.6 ans
radius= diameter/2
=42/2=21
area of (b)= 2πr
=2×3.14×21
=131.88 ans
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