Question

A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, as shown in figures. If the height of the cylinder is 38 cm and its base is of radius 19 cm, find the total surface area of the article.​

Answer 1

Answer:

Step-by-step explanation:

We have

Height of cylinder= 10cm

radius of base= 3.5cm

Total surface area of the article =Curved surface area of the cylinder +2 surface area of a hemisphere

                                                  =2πrh+2(2πr 2 )

                                                  =2πr(h+2r)

                                                  =2× 7/22 ×3.5(10+2×3.5)cm 2

                                                  =374cm 2