- A154
- B308
- C38.5
- D77
Step-by-Step Solution
The distance from the centre to the boundary is the RADIUS. r = d ÷ 2 = 154 ÷ 2 = 77 m. Quoting the diameter 154 m is the trap; 308 m doubles it instead of halving.
Answer: D) 77
A circular cricket ground has a diameter of 154 m. A fielder at the exact centre throws the ball to a teammate standing on the boundary. How far does the ball travel (in m)?
Class 7Perimeter and AreaPerimeter and Area
Key idea: Area of a circle
**Area of a circle = π × .**
Note it's squared, not . So if , area = π × 49 (not π × 14).
Example cm, π = .
Example cm, π ≈ 3.14): A ≈ .
Note it's squared, not . So if , area = π × 49 (not π × 14).
Example cm, π = .
Example cm, π ≈ 3.14): A ≈ .
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