Question

3A boiler is in the form of a cylinder 2m long with hemisphere ends each of 2m diameter. Find the surface area af boiler. ​

Answer 1

SOLUTION :  

Given :  

• Diameter of the hemisphere = 2 m

• Radius of the Cylinder &  hemisphere,  r = 1 m

• Height of the cylinder , h = 2 m

Total volume of the boiler = Volume of the cylindrical portion + Volume of the two hemispheres  

V = πr²h + 2(2/3 πr³)

V = πr²h + 4/3 πr³

V = πr²(h + 4/3 r)

V = 22/7 × 1² ( 2 + 4/3 ×1)

V = 22/7 × 1× (2 + 4/3)

V = 22/7[(6+4)/3]

V = 22/7 × 10/3 = 220/21

V = 220/21 m³

Hence,the  volume of the boiler is  220/21 m³

Answer 2

Answer:

18.85 m square is the answer