The radius of a giant metal spherical ball is 12cm. Its outer surface is required to be painted. What will be the cost of painting at the rate of  ₹7 per $$cm^2$$​ (Approximate to the nearest integer)(Take $$\pi = \frac{22}{7}$$​)

Correct option is A

Given:

Radius of giant spherical ball  = 12cm

Cost of painting per$$cm^{2}$$= ₹7

Formula Used:

Surface area of sphere = $$4 \pi r^{2}$$​​

Solution:

Radius of  sphere = 12cm

Surface area of sphere = $$4 \pi (12)^{2}$$​​

​$$= 4\times \frac{22}{7}\times 144$$​​

​$$=\frac{12672}{7}cm^{2}$$​​

Cost of painting = $$\frac{12672}{7}\times7 = ₹12672$$​​