Question

if width of hollow cylinder is 2 cm. its internal diameter is 14 cm and height is 26 CM . both the ends of cylinder are open ,then find the total surface area of hollow cylinder

Answer 1

internal diameter=14cm therefore external diameter=18cm as witch of hollow cylinder is 2cm total surface area of hollow cylinder =csa of external cylinder+ csa of internal cylinder +area of two rings so total surface area = 2816cm^2