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?
:.. 11 ho
r lindrill​

Answer 1

Answer:

Step-by-step explanation:

total area of tank = surface area of cylinder + 2 × cross section area of tank

= 2πrL + 2πr²

= 2πr ( L + r)

Given,

diametre of base = 140 cm

radius of base (r) = 70cm

height of tank (L) = 1 m = 100 cm

total area = 2πr(L + r)

= 2 × 22/7 × 70 × ( 100 + 70)

= 20 × 22 × 170 cm²

= 74800 cm²

= 7.48 m²

hence, 7.48 m² sheets are required for the making tank

Answer 2

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