Question

the cost of raw materials is 2500 per km. calculate the total cost of raw material required to build of train track in earth.assume the earth to be spherical shape while doing your calculation​

Answer 1

Answer:

Step-by-step explanation:

Cost of Raw material is 2500 per km

Total surface area of sphere = 4$\pi r^{2}$

let ''r' is radius of earth having value 6400 km

Total surface area of earth = 4*3.14*3.14*6400

                                             = 514457600

Toat cost of raw materials = 514457600*25 = 1.286144e12