The cost of painting a spherical vessel of radius 7cm is Rs.18,480. What is the cost of painting per square centimetre? (Use = 22/7)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Rs. 30 .
Surface area of sphere = 4 × 22/7 × 7 × 7 = 616 cm²
Cost = Rs.18,480
Cost per cm² = 18480 ÷ 616 = Rs.30