Question

It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm from a metal sheet. How many square metres of the sheet are required for the same?​

Answer 1

Answer:

Step-by-step explanation:

Here the cylinder is closed cylinder.

therefore we have to find the total surface area of the cylinder.

Heigt of the cylinder=1m=100cm

Diameter=140 cm

radius=140/2=70  cm

Total Surface Area of cylinder is 2πrh+2πr^2  

=2πr(h+r)=2×  22 /7 ×(70)(100+70)=7.48 m  ^2

 

Answer 2

hope it's help u..............