Question

The diameter of a sphere made of iron sheet is 14cm,let us calculate What is the cost of colouring the sphere at Rs.2.50 per square cm.​

Answer 1

Step-by-step explanation:

Given The diameter of a sphere made of iron sheet is 14 cm,let us calculate What is the cost of colouring the sphere at Rs.2.50 per square cm.

So total area of a sphere will be TSA = 4 π r^2

So diameter = 14 cm

Radius = d / 2

         = 14 / 2

         = 7 cm

                     So TSA =  4 x 22 / 7 x 7 x 7

                                 = 88 x 7

                                 = 616 sq cm

Now total surface area of sphere is 616 sq cm

The cost of colouring the sphere for 1 sq cm is Rs 2.50

Therefore for 616 sq cm it will be Rs 1540

Reference link will be

https://brainly.in/question/6677377