Question

A closed cylinder tank of height 1.4m.and radius of the Base is 56cm.is made up of a thick metal sheet .How much metal sheet is required (express in square metres )

Answer 1

Given
Hight of the cylinder =h =1.4m =140cm
radius =r = 56cm
Required metal sheet = total surface area of the cylinder
=2*pi*r(r+h)
=2*22/7*56(56+140)
=2*22*8*196
=68992 cm^2
=6.8992m^2

Answer 2

Hi Friend !!

Height of the cylinder = h = 1.4m = 140cm

[ 1 m = 100 cm ]

Radius = r = 56 cm
Total metal sheet required = T.S.A. of the cylinder
=2πr(r+h)
=2×22/7×56(56+140)
=2×22×8×196
=68992 cm²
= 6.8992 m²