wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A wooden article was made by scooping out a hemisphere from each end of a cylinder, as shown in the figure. If the height of the cylinder is 20cm and its base is of diameter 7cm, find the total surface area of the article when it is ready.

Open in App
Solution

Height of the cylinder =20cm
Base radius of the cylinder =3.5cm

The total surface area would be the sum of the curved surface area of cylinder and the surface areas of 2 hemispheres which is given by
2πrh+2×2πr2=2πrh+4πr2=2πr(h+2r)=2×227×3.5×(20+2×3.5)=22×27=594 cm2


flag
Suggest Corrections
thumbs-up
82
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Combination of Solids
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon