Advertisement Remove all ads

A Fez, the Cap Used by the Turks, is Shaped like the Frustum of a Cone. If Its Radius on the Open Side is 10 Cm, Radius at the Upper Base is - Mathematics


A fez, the cap used by the Turks, is shaped like the frustum of a cone. If its radius on the open side is 10 cm, radius at the upper base is
4 cm and its slant height is 15 cm, then find the area of material used for making it.

Advertisement Remove all ads


We have, 

Radius of open side, R = 10 cm,

Radius of upper base, r = 4 cm and

slant height, l = 15 cm


The area of material used  =π (R + r)l +πr2

`= 22/7xx(10+4)xx15+22/7xx4xx4`

`= 22/7xx14xx15+22/7xx4xx4`

`= 22/7xx(14xx15+4xx4)`

`= 22/77xx226`

`=4972/7  cm"`

≈ 710.28 cm2

So, the area of material used for making the fez is 710.28 cm2.

  Is there an error in this question or solution?
Advertisement Remove all ads


RS Aggarwal Secondary School Class 10 Maths
Chapter 19 Volume and Surface Area of Solids
Exercise 19C | Q 20 | Page 912
Advertisement Remove all ads

Video TutorialsVIEW ALL [2]

Advertisement Remove all ads

View all notifications

      Forgot password?
View in app×