Question

ExERCISE - 10.2 1. A closed cylindrical tank of height 1.4 m . and radius of the base is 56 cm . is made up of a thick metal sheet. How much metal sheet is required (Express in square meters)

Answer 1

The formula to calculate the total surface area of a cylinder is expressed as, total surface area of cylinder = 2πr(r + h). This total surface area includes the area of the 2 bases (2πr²) and the curved surface area (2πrh). Here 'r' is the radius and 'h' is the height of the cylinder.

So we have: surface area = (2)(22/7)(0.56m)(0.56m+1.4m) = 6.8992 m²