Question
Download Solution PDFCalculate the cost to paint a water tank in the shape of a sphere having a radius of 7 cm, if the cost of painting is Rs.4.5/cm2 . (π = 22/7)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven data:
Radius of the sphere (tank): 7 cm
Cost of painting per cm²: Rs.4.5
Pi = 22/7
Concept: The formula for the surface area of a sphere is 4πr². Multiply this by the cost per cm² to get the total cost.
⇒ Surface area = 4 x 22/7 x 72 cm2 = 616 cm2
⇒ Total cost = 616 cm2 x Rs.4.5 = Rs.2772
Therefore, the cost to paint the water tank is Rs. 2772.
Last updated on Jul 8, 2025
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