Question

A cylindrical vessel, without lid,has to be tin coated on its both sides.if the radius of the base is70 cm and its height 1.4m,calculate the coast of tin coated at the rate of rs 3.50 per 1000 cm

Answer 1

Find the total surface area then subtract the surface area of lid(equation a) Then rs 3.50 *1000=rs 3500 per cm(equation b). Then (equation (a * b)*2 ).