Question

hi please find the ans​

Answer 1

Answer:

Step-by-step explanation:

given

diameter=21cm

radius=21/2 cm

        = 10.5cm

  curved surface area=1320cm²

                 2πr²h=1320

            2×22/7×10.5²×h=1320

           66×10.5×h=1320

           693×h=1320

                  h= 1320/693

                h = 20/11

   h =1.81cm