CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Question 11
The students of Vidyalaya were asked to participate in a competition for making and decorating penholders in the shape of a cylinder with a base, using cardboard. Each penholder was to be of radius 3 cm and height 10.5 cm. The Vidyalaya was to supply the competitors with cardboard. If there were 35 competitors, how much cardboard was required to be bought for the competition? [Assume π=227]

Open in App
Solution

Radius (r) of the circular end of cylindrical penholder = 3 cm
Height (h) of the penholder = 10.5 cm
Surface area of 1 penholder = CSA of penholder + Area of base of penholder
=2πrh+πr2=[2×227×3×10.5+227×(3)2]cm2=(132×1.5+1987)cm2=(198+1987)cm2=15847 cm2
Area of cardboard sheet used by 1 competitor =15847 cm2
Area of cardboard sheet used by 35 competitors
=(15847×35)cm2=7920 cm2

flag
Suggest Corrections
thumbs-up
90
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon