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 = 70cm = 0.7m
Area of sheet required = Total surface are of tank = 2πr(r+h) unit square
= [2×(22/7)×0.7(0.7+1)]
= 7.48 square meters
Therefore, 7.48 square meters of the sheet are required.
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