Rajesh is playing with a football having a diameter of 28 cm. He wants to get a photo of his favourite player painted on the entire ball. The painter charges ₹2/cm2. What will be the cost (in ₹) of painting the ball (take π = )?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 4,928.
Radius (r) = 28/2 = 14 cm
Surface area of a sphere = 4πr2 = 4 × (22/7) × 142 = 2464 cm2
Total cost = 2464 × 2 = 4928
Therefore, the cost of painting the ball will be ₹4928.