Question

A cylinder has a diameter of 20 cm. The area of curved surface is 100 . Find:



i) The height of the cylinder

ii) The volume of the cylinder​

Answer 1

Answer:

Given: Diameter of cylinder =20 cm

Thus radius of the cylinder (r)=  

2

20

​  

=10 cm

Let, height of the cylinder =h cm

Given: Area of the curved surface area =100 cm  

2

 

Therefore, 2πrh=100

⇒2×  

7

22

​  

×10×h=100

⇒h=  

2×220

100×7

​  

=1.59 cm =1.6 cm (corrected to one decimal place)