Question

a cylindrical tank with hemispherical ends having radius 0.42cm and total height 3.84m. find total surface area of closed rank​

Answer 1

Answer:

118.008 square meter

Step-by-step explanation:

Total surface area of the tank = lateral surface area of the hemisphere + lateral surface area of cylinder + bottom circle surface area

Given that r = 0.42 m and h = 3.84 m

Lateral surface area of the hemisphere = 2 πr² = 2*22*0.42*0.42/7

= 44*0.42*0.6  

= 11.088 square meter

Lateral surface area of the cylinder = 2 πrh = 2*22*0.42*3.84/7

= 44*0.6*3.84  

= 101.376 square meter

Bottom area of circle = πr² = 5.544 square meter.

Total surface area of tank = 11.088 + 101.376 + 5.544 = 118.008 square meter