Question
Download Solution PDFAman wants to get his spherical overhead water tank having a diameter of 7 m. painted. If the cost of painting is ₹13 per square metre, find the cost of painting Aman's spherical overhead water tank. (Use π = \(\frac{22}{7}\))
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
The diameter = 7m and cost of painting = ₹13 per square metre,
Formula used:
The surface area of the sphere = 4πr2 .(r = radius)
Radius = diameter / 2
Calculation:
The surface area of the spherical overhead water tank is
⇒ 4 × 22 / 7 × 7/2 × 7/2
⇒ 154 sq m
Then, the total cost will be ,
⇒ 154 × 13 = ₹2,002
∴ The correct option is 3
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