Question

A right corcular cylindrical tunnel of diameter 23m and length 40m is to be constructed from a sheet of iron. The area of iron sheet required is?

Answer 1

Hi there !!

Diameter = 23 m

Radius = r = 23/2 m

Length = Height = h = 40 m

Area of iron sheet required is = C.S.A of the cylindrical tunnel = 2πrh
 
                                             = 2 × 22/7 × 23/2 × 40

                                             = 2891.42 m² [ approx.]


 

Answer 2

r= 23/2 m

h = 40 m

Area of iron sheet required = C.S.A of the cylindrical tunnel = 2πrh
 
                                             = 2 × 22/7 × 23/2 × 40

                                             = 2891.42 m²