Radius of the tent, r =1682 m = 84 m.
Height of the tent = 85 m.
Height of the cylindrical part, H = 50 m.
Height of the conical part, h = (85 - 50) m = 35 m.
Slant height of the conical part, l = √h2+r2=√(35)2+(84)2−√8281m = 91 m
Quantity of canvas required
= Curved surface area of the tent
= Curved surface area of the cylindrical part + Curved surface area of the conical part
= 2πrH + πrl = πr(2H + I)
= 227×84(2×50+91)m2=(22×12×191)m2=50424m2.
Area of canvas required for folds and stitching
= (20% of 50424) m2
= (20100) × 50424 m2
= 10084.80 m2.
Total quantity of canvas required to make the tent
=(50424+10084.80)m2=60508.80m2=60509m2