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Find the total curved surface area of cylinder whose height is 20 cm and radius 7 cm. |
| Answer» TSA of cylinder is 1188 cm².Step-by-step explanation:Given :-Height(h) of the cylinder is 20 cm.Radius (r) of the cylinder is 7 cm.To find :-Total surface area (TSA) of the cylinder.Solution :-Height (h) = 20 cmRadius (r) = 7 cmFormula used :Total surface area of cylinder,= 2πr(h+r)=[ 2× (22/7) × 7 (20+7) ] cm²= [2×(22/7)×7×27] cm²= (2×22×27) cm²= 1188 cm²Therefore, the total surface area of the cylinder is 1188 cm²._________________Some formulas :-Volume of cylinder = πr²hT.S.A of cylinder = 2πrh + 2πr²Volume of CONE = ⅓ πr²hC.S.A of cone = πrlT.S.A of cone = πrl + πr²Volume of CUBOID = l × b × hC.S.A of cuboid = 2(l + b)hT.S.A of cuboid = 2(lb + bh + lh)C.S.A of cube = 4a²T.S.A of cube = 6a²Volume of cube = a³Volume of SPHERE = 4/3πr³Surface area of sphere = 4πr²Volume of hemisphere = ⅔ πr³C.S.A of hemisphere = 2πr²T.S.A of hemisphere = 3πr² | |