Question

A wooden article was made by scooping out a hemisphere from each end of a solid cylinder,as shown in fig.if the height of the cylinder is 10cm and it's base is of radius 3.5cm.find the total surface area of the article.
A heap of rice is in the form of a cone of base diameter 24m and height 3.5m.find the volume of the rice.how much canvas cloth is required to just cover the heap

Answer 1

hope this helps you ☺☺☺

Answer 2

Hello.....
Friend..


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This is a well asked question is the CBSE -18


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So your solution is here..


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r=3.5cm——->cylinder.


Height—->10cm.


TSA——->2pi r h + 2pi rsq.


Therefore,friend just keep the values..

Answer——>297cm square.


CSA of hemisphere..

2pi r sq..


Curved surface area of both the h I sphere...2 x1surfave area..


So,csa ofboth the surface =4pi r sq



Answer by keeping values=====>>>>
154cm2.

Base area of hemisphere—> both the hemisphere..


2pi r sq.



Therefore answer by keeping bales..77 cm2..



So,




Area of remaking solid =297+154-77cm2


======>>>>> 374cm2 answe..r


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Therefore, tsa is 374 cm2 answer...


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Hope it helps you..

Thanks..

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