Question

It is required to make a closed cylindrical tank of height 2 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:

h = 2m and 140 cm

Step-by-step explanation:

140 / 2 = 70 m

Answer 2

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 :-

Here, height (h) = 1 m

Diameter of the base = 140 cm = 1.40 m

Radius (r) = 1.40/2m = 0.70 m

Total surface area of the cylinder = 2πr (h + r)

= 2 x 22/7 x 0.70(1 + 0.70)m^2

= 2 x 22 x 0.10 x 1.70 m^2

= 2 x 22 x 10/100 x 170/100m^2

= 748/100m^2 = 7.48 m^2

Hence, the required sheet = 7.48 m^2

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