Question

it's required to make a closed cylindrical tank of height 1m and base diameter 140 cm from a metal sheet how many square metres of the same?

Answer 1

Hello mate ,

Your answer:-

__________________________

Height of closed cylindrical tank ,h=1 m

Base diameter of cylindrical tank =d=140 cm 

=140/100

=1.4 m

⇒ Radius of cylindrical tank ,r

=d/2

=1.4/2

=0.7 m

Total surface area of cylindrical tank 

=2πr(r+h)=2×22/7×0.7(0.7+1)

=2×22/7×0.7×1.7

=7.48 m^2

so , total 7.48 m^2 sheet is required.

I hope, this will help you.☺

Thank you______❤

__________________________❤

Answer 2

$\huge \underline \mathbb {SOLUTION:-}$

Let h be the height and r be the radius of a cylindrical tank.

Height of cylindrical tank, h = 1m

Radius = half of diameter

= (140/2) cm = 70 cm

= 0.7m

Area of sheet required = Total surface are of tank = 2πr(r + h) unit square

[ 2 x 22/7 × 0.7 (0.7 + 1)]

= 7.48

Therefore,

• 7.48 square meters of the sheet are required.

$\setlength{\unitlength}{1.0 cm}}\begin{picture}(12,4)\thicklines\put(1,1){\line(1,0){6.5}}\put(1,1.1){\line(1,0){6.5}}\end{picture}$