Question 2 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 meters of the sheet is required for the same? [Assumeπ=227]
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Solution
Height (h) of the cylindrical tank = 1 m Base radius (r) of cylindrical tank=(1402)cm=70cm=0.7m
Area of sheet required = Total surface area of the tank =2πr(r+h) ⇒[2×227×0.7(0.7+1)]m2=(4.4×1.7)m2=7.48m2